Causey, Nell B.

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Journal of the Arkansas Academy of ScienceVolume 5 Article 61952On Two New Species and New DistributionRecords of Paraiulid Milipeds from the EasternUnited StatesNell B. CauseyFollow this and additional works at: http://scholarworks.uark.edu/jaasPart of the Entomology CommonsThis article is available for use under the Creative Commons license: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0). Users are able toread, download, copy, print, distribute, search, link to the full texts of these articles, or use them for any other lawful purpose, without asking priorpermission from the publisher or the author.This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Journal of the Arkansas Academyof Science by an authorized editor of ScholarWorks@UARK. For more information, please contact scholar@uark.edu, ccmiddle@uark.edu.Recommended CitationCausey, Nell B. (1952) "On Two New Species and New Distribution Records of Paraiulid Milipeds from the Eastern United States,"Journal of the Arkansas Academy of Science: Vol. 5 , Article 6.Available at: http://scholarworks.uark.edu/jaas/vol5/iss1/6ON TWO NEW SPECIES AND NEW DISTRIBUTION RECORDS OF PARAIULIDMILLIPEDS FROM THE EASTERN UNITED STATESNELL B. CAUSEYFayetteville, ArkansasMillipeds of family Paraiulidae are known from North America and EasternAsia, with 26 genera and approximately 113 species occurring in the UnitedStates and Canada. In the United States the family is best known from east ofthe Mississippi River, but much remains to be learned about range of species,variation within a species, and the taxonomic characters of females. Several ofthe species described by H. C. Wood and Charles H. Bollman from this area havenever been reported since their initial collection. There are undoubtedlyothers that are undescribed.The distribution within a state is perhaps best known in Ohio, where Wil-liams and Hefner (1928) collected 8 species. Ihave identified the following 7species from Illinois: Oriulus yenustus (Wood), Hakiulus diversi frons (Wood),Aliulus rugosus (Bollman), Ptyoiulus ectenes (Bollman), Illiulus illinoensisCausey, {Jroblaniulus sandersoni Causey, and Aniulus bollmani, new name; anotherspecies of Uroblaniulus occurs in counties of Indiana bordering Illinois and maybe found in Illinois.Many of the specimens studied during the preparation of this paper are inthe collection of the Illinois Natural History Survey and were made available tome through the kindness of Dr. Milton W. Sanderson. The holotypes of Aniulusorientalis and Uroblaniulus stolidus will oe deposited in the American Museum ofNatural History.Genus AniulusChamberlin 1940. Bull. U. Utah. 30(11): 3.Aniulus bollmani, nomen novumJulus impressus Say [nomen nudum] 1821. Jour. Acad. Nat. Sci. Phila. 2( 1):102.lulus venustus Wood [partim] 1864. Ibid. (1864):10; 1865, Myr. N. Amer. , 196.,fig. 29.Parajulus impressus (Say). Bollman, 1887, Ann. N. Y. Acad. Sci. 4:24; 1893, Myr.N. Amer., 52, 144.Parajulus venustus (Wood). Bollman, ibid. 183Parajulus venustus (Wood). Brolemann, 1922, Ann. Ent. Soc. Amer. 15:295, figs.43-50[non] Parajulus impressus (Say). Brolemann, 1922, ibid. , 294, figs. 35-42.Parajulus impressus (Say). Williams & Hefner, 1928, Ohio Biol. Sur. . Bull. 18,127, fig. 21.Parajulus impressus (Say). Hefner, 1929, J. Morph. & Phys. 48( 1):153- 163, 4 pis.[?] Aniulus impressus (Say). Chamberlin, 1940, Bull. U. Utah. 30(11): 3.Aniulus venustus (Wood). Chamberlin, 1947, Proc. Acad. Nat. Sci. Phila. 99:36.Aniulus impressus (Say). Causey, 1950, Proc. Ark. Acad. Sci. 3: 46., figs. 7, 8.Some of the 14 millipeds described by Thomas Say were collected in Florida,others in Pennsylvania or from states in between. Unfortunately, he gave nolocality for J. impressus, the only species of family Paraiulidae described byhim, but later authors (Wood, 1865; Bollman, 1887, 1893) somehow deduced thateither Georgia or Florida was the type locality. Since the description containsno specific characters, it can be assumed that Say believed that all of theparaiulids which he encountered-and there are several in the area from whichhis collections were made - to be one species. For these reasons J. impressusSay must become a nomen nudum as of 1821. Aliulus bollmani , nomen novum, ishence proposed for a widely distributed and perhaps the best known Middle West-ern milliped, to which the trivial names impressus and venustus have been ap-plied for almost three-quarters of a century.H. C. Wood (1864, 1865) confused two species of Illinois paraiulids, aspointed out by Hefner (1929, p. 154). In his description of venustus, he showed19Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6Published by Arkansas Academy of Science, 19521•20 ARKANSAS ACADEMY OF SCIENCE'IIfigures of the male gonopods of venustus (1865, p. 197, figs. 26*-28) and thefemale genital apparatus (ibid., fig. 29) of another and more common species.That Wood was aware of some of this confusion is indicated by the followingstatement:"Itis most probable that I. venustus, W ood, is the species intendedto be indicated by Mr. Say under the name of impressus, although hisdescription is so meagre that it could be applied to other species.The locality would seem to fix it, however." {ibid., p. 197)C. H. Bollman (1887, p. 34) adequately described the male of the speciesthat Wood had drawn the female genital apparatus of and he designated it asimpressus Say, but unfortunately he did not realize that two species were repre-sented in Wood's description of venustus. He altered his position in a paperpublished (1893, p. 183) after his brief, brilliant career, in which he stated,but still erroneously, that "the true impressus is found in Indiana, Georgia,and Florida, while venustus is found in Colorado, Kansas, Minnesota, Michigan,Illinois, and Indiana."For his study of female paraiulids, Henry W. Brolemann (1922) used speci-mens obtained through H. V. Chamberlin. His figures 35-42, labelled venustus(Wood), are really the impressus of Bollman 1887, and figures 35-42, labelledimpressus (Say), are a species of Oriulus.Williams and Hefner (1928), Hefner (1929), and Causey (1950) applied thetrivial name of impressus to the species, and Chamberlin (1947) has usually usedvenustus.Aninlus bollmani is thus to be applied to the milliped which has most oftenbeen determined as Aniulus impressus (Say), after Bollman, 1887, who describedthe male, and Wood, 1864, 1865, the female. It is distinct from Oriulus venus-tus (VVood), as clearly indicated by Wood's figures of the anterior gonopods ofvenustus. Itcan be identified by the coxal lobes of the male gonopods, whichare in the form of irregular, chitinous plates, each rolled medially in the ver-tical plane to form a partially closed tube; also of specific value is the ser-rated inner curvature of the seminal blade of the posterior gonopods; normallythe seminal blades are contiguous medially, but they do not cross each other.The species has been identified by the writer from the following states: Ohio,Indiana, Illinois, Michigan, Minnesota, Wisconsin, and North Dakota; it probablyoccurs also in Pennsylvania. Its frequent occurence in fields of corn in dryweather has led to the common name of corn milliped.4niuIiis orientalis, n. spFigures 1-4One of the smaller members of the genus, with the male gonopods nearestthose of An. bollmani; distinguished from bollmani by the absence of serrationsalong the inner curvature of the seminal blades and by the coxal lobes, whichtogether form a single cuplike-like structure, much as in A. adelphus Chamberlin1940, rather than two open tubes.Male holo type. --Lateral margins of collum wide and straight, each with oneentire sulcus and a partial one. Vertical segmental sutures about the diameterof the pores from the pores and weakly curved. Anal spine straight, extendingslightly beyond anal valves. Sternal plate of eighth segment triangular, ex-tending almost to the posterior margin of the anterior gonopods (Fig. 4).Femur of anterior gonopods of the usual shape and size; coxal lobe rela-tively larger than in bollmani, laminate, roughly rectangular, with a keel onthe anterio-lateral surface (Figs. 1, 2, k), the mesial surface smooth and con-cave. Each posterior gonopod (Fig. 3) consists of a flattened seminal blade,sigmoidally curved, and of a shorter accessory blade. In situ the coxal lobesare almost vertical, the two forming a single large cup, open ventrad and cau-dad, around the posterior gonopods; the seminal blades are subvertical, contigu-ous, or approximately so near their apices, and the accessory blades probablycross at the middle as in adelphus.Diameter 1. 5 mm.Locality probably Durham, North Carolina; 2 males collected Dec. 9, 1939;N. Causey.20Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6http://scholarworks.uark.edu/jaas/vol5/iss1/6Explanation of FiguresAniulus orientalis, male paratype.Fig. 1. Left anterior gonopod, lateral view; k, keel on coxal lobe.Fig. 2. Same, cephalic view.Fig. 3. Right posterior gonopod, mesial view.Fig. 4. Sternal process of eighth segment.Aliulus rugosus (Bollman), male.Fig. 5. Left anterior gonopod, lateral view.Uroblaniulus stolidus, male holotype.Fig. 6. Posterior segments.Fig. 7. Gonopods, ventral view.Fig. 8. Left anterior gonopod, dorsal view.Fig. 9. Left posterior gonopod, dorsal view.21MILLIPEDS FROM THE EASTERN UNITED STATES21Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6Published by Arkansas Academy of Science, 1952r22 ARKANSAS ACADEMY OF SCIENCEGenus AliulusCausey 1950. Proc. Ark. Acad. Sci. 3:1.Aliulus rugosus (Bollman)Figure 5Parajulus rugosus Bollman, 1887, Ent. Amer. 3:81 (Myr. N. A., 70, 105).P. rugosus Bollman. Williams & Hefner, 1928, Ohio Biol. Sur. Bull. 18, p. 127figs. 19C, 20 A.The following notes on this rare species were made from a male of 56. seg-ments, diameter 2.6 mm, from Owen Co., Indiana, and from two females from Putnamand Calhoun Cos., Illinois. Determination of both sexes is made with some res-ervation until specimens from Pennsylvania can be studied.Posterior gonopods very similar to those of the genotype, AI. carrollusCausey 1950, but instead of a minute subterminal tooth on the seminal blades,there is a minute notch in the ventral margin. Seminal blades contiguous medi-ally, where they are flattened vertically; just behind the coxal lobes the endof each turns abruptly laterad and horizontally. The shorter accessory bladefollows the curvature of the seminal blade.Coxal lobe of anterior gonopods simple, subtriangular in outline, thickenedat the tip and along the posterior margin, and with a distinctive horizontalridge ectad (Fig. 5). The broad surface of the coxal lobe is outward, and bothit and the femur are almost perpendicular to the main body axis. This is incontrast to carrollus, in which the broad surfaces of the coxal lobes are hori-zontal and the cleft ends are contiguous medially.Sternal piece of eighth segment of male wide, the medial extension tongue-like as in carrollus.Female genital apparatus very similar to that of carrollus, with the ven-tral margin of the synoperculum unusually wide and rough. The sternites of thethird segment are cut off obliquely and higher up than in other paraiulids.Genus IIIiulus , emend.Causey 1950, Proc. Ark. Acad. Sci. 3:47.In the original description of this genus is the statement that "the poste-rior gonopods have no separate accessory blade, that structure probably beingrepresented by a ridge which arises at the base of the lateral surface of theseminal blade." This should be emended to read: Proximal half or more of ac-cessory blade fused with seminal blade, appearing as a ridge on the lateralsurface; the distal region of accessory blade simple and free as in relatedgenera.Illiulus illinoensisCausey 1950, ibid., figs. 13-17.In males collected in Jefferson and Yell Cos., Ark., the free portion ofthe accessory blade has a diameter of about one- third that of the seminal bladeat the point where they diverge; the accessory blade continues ventrad verti-cally, the apex reaching slightly below the lowest level of the outer curvatureof the seminal blade. These specimens differ slightly from the holotype in thatthe coxal lobes are a little longer and are without the slight undulations inthe lateral margins.Genus Uro b IaniulusUroblaniulus Attems. Chamberlin and Hoffman, 1950, Nat. Hist. Misc., No. 71, 6.U ro blaniulus s toIidus, n. spFigures 6-9This species is near dux (Chamberlin 1914). Itdiffers from dux in thatthe femora of the anteroir gonopods are not broad, the femora and coxal piecesare almost of the same length, and the coxal pieces do not "enlarge again alittle," nor are they "distally subtruncate; " unlike dux, the posterior gonopodsdo extend beyond the anterior. Anal spine shorter than in any other species ofthe genus and not curved.22Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6http://scholarworks.uark.edu/jaas/vol5/iss1/6MILLIPEDS FROM THE EASTERN UNITED STATES 23iMale holotype. - Lateral margin of collum with three entire sulci on oneside and two on the other. Eyes subtriangular, ocelli in 6 rows, 9 or 10 to 3ocelli in each row. Anal spine stout and short (Fig. 6).Femora of anterior gonopods weakly clavate, setae arranged in two areas(Pig. 7). Coxal pieces slightly excavated medially, abruptly narrowed distad,the apices obliquely truncate and almost as long as femora. Dorsally the coxalpieces have the usual lateral and medial folds (Fig. 8), the shape distinctivefor the species.Each posterior gonopod consists of four longitudinal pieces (Fig. 9): ven-trad are the medial, narrow piece and the lateral main piece with its distalmargin almost straight; dorsad are the medial, short piece and the long column,which is longitudinally striate, finely pubescent distally, and the longestpiece of the four. In ventral view the posterior gonopods are visible betweenand beyond the anterior.Diameter 1.6 mm., 46. segments, last 3 legless.Type locality. - Penninsula State Park, Door Co., Wise; one male Sept. 29,1951; Dr. and Mrs. H. W. Levi.Several specimens of U: immaculatus (Wood) were collected by the Levis thesame day from the same general locality.Genus P tyoiulus , emendChamberlin 1940, Bull. U. Utah 30 (11): 15-In all known species the posterior gonopod has a basal accessory branch.P tyoiulus ectenes (Bollman)Parajulus ectenes Bollman, 1887, Proc. U. S. Nat. Mus. 10:617 (Myr. N. A., 34).Ptyoiulus coveanus Chamberlin, 1943, Bull. U. Utah 34(6): 10, figs. 24-25.When Bollman wrote that the male genitalia of ectenes are entirely differ-ent from those of pennsylvanicus (Brandt), he obviously meant to imply only thatthe two species are separable on the basis of the genitalia. Specimens ofectenes from Raleigh and Durham, N. C. , correspond with Bollman' s description ofthe types except that the anal spine passes beyond the anal valves, as in otherspecies of the genus. The gonopods are distinguished from those of pennsylvani-cus and georgiensis Chamb. 1943 collected at Hockaway, N. J. , and Blount Co.,Ala., respectively, principally by the type of setae on the femora, the shape ofthe corolla, and the shape of the posterior gonopods. The setae on the ventralsurface of the distal region of the femora are, in pennsy Ivanicus and georgien-sis, of two types: medially there is an area of evenly short, fur-like setae;laterad the setae are of uneven length, but longer; between the two areas is ashort, longitudinal, glabrous ridge. In ectenes there is no fur-like area, thesetae are of irregular length, and there is no longitudinal ridge. The corolladiffers from that in other species in that it is smaller, flares less, it is notstriated, the margin is not serrated, and it is cut away to the base dorsally;inside the corolla, the apex is blunt rather than sharp and hooked. The mainpiece of the posterior gonopods differs from that in other species in that thedistal enlargement is smaller; the crook shown by Chamberlin (1943, fig. 25)appears when the piece dries. In ectenes the lateral margin of the distal halfof the penial plate are concave; in other species they are convex.Specimens of ectenes in the collection of the Illinois Natural HistorySurvey are from Goodlettsville, Tenn. , and from Pope, Hardin, and Gallatin Cos.,111. Diameter of adult specimens is from 1.5 to 1.7 mm.23Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6Published by Arkansas Academy of Science, 195224Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6http://scholarworks.uark.edu/jaas/vol5/iss1/6

On Two New Species and New Distribution Records of Paraiulid Milipeds from the Eastern United States

UARK (University of Arkansas )

Journal of the Arkansas Academy of Science Volume 5 Article 6 1952 On Two New Species and New Distribution Records of Paraiulid Milipeds from the Eastern United States Nell B. Causey Follow this and additional works at: https://scholarworks.uark.edu/jaas  Part of the Entomology Commons Recommended Citation Causey, Nell B. (1952) "On Two New Species and New Distribution Records of Paraiulid Milipeds from the Eastern United States," Journal of the Arkansas Academy of Science: Vol. 5 , Article 6. Available at: https://scholarworks.uark.edu/jaas/vol5/iss1/6 This article is available for use under the Creative Commons license: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0). Users are able to read, download, copy, print, distribute, search, link to the full texts of these articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Journal of the Arkansas Academy of Science by an authorized editor of ScholarWorks@UARK. For more information, please contact scholar@uark.edu. ON TWO NEW SPECIES AND NEW DISTRIBUTION RECORDS OF PARAIULIDMILLIPEDS FROM THE EASTERN UNITED STATESNELL B. CAUSEYFayetteville, ArkansasMillipeds of family Paraiulidae are known from North America and EasternAsia, with 26 genera and approximately 113 species occurring in the UnitedStates and Canada. In the United States the family is best known from east ofthe Mississippi River, but much remains to be learned about range of species,variation within a species, and the taxonomic characters of females. Several ofthe species described by H. C. Wood and Charles H. Bollman from this area havenever been reported since their initial collection. There are undoubtedlyothers that are undescribed.The distribution within a state is perhaps best known in Ohio, where Wil-liams and Hefner (1928) collected 8 species. Ihave identified the following 7species from Illinois: Oriulus yenustus (Wood), Hakiulus diversi frons (Wood),Aliulus rugosus (Bollman), Ptyoiulus ectenes (Bollman), Illiulus illinoensisCausey, {Jroblaniulus sandersoni Causey, and Aniulus bollmani, new name; anotherspecies of Uroblaniulus occurs in counties of Indiana bordering Illinois and maybe found in Illinois.Many of the specimens studied during the preparation of this paper are inthe collection of the Illinois Natural History Survey and were made available tome through the kindness of Dr. Milton W. Sanderson. The holotypes of Aniulusorientalis and Uroblaniulus stolidus will oe deposited in the American Museum ofNatural History.Genus AniulusChamberlin 1940. Bull. U. Utah. 30(11): 3.Aniulus bollmani, nomen novumJulus impressus Say [nomen nudum] 1821. Jour. Acad. Nat. Sci. Phila. 2( 1):102.lulus venustus Wood [partim] 1864. Ibid. (1864):10; 1865, Myr. N. Amer. , 196.,fig. 29.Parajulus impressus (Say). Bollman, 1887, Ann. N. Y. Acad. Sci. 4:24; 1893, Myr.N. Amer., 52, 144.Parajulus venustus (Wood). Bollman, ibid. 183Parajulus venustus (Wood). Brolemann, 1922, Ann. Ent. Soc. Amer. 15:295, figs.43-50[non] Parajulus impressus (Say). Brolemann, 1922, ibid. , 294, figs. 35-42.Parajulus impressus (Say). Williams & Hefner, 1928, Ohio Biol. Sur. . Bull. 18,127, fig. 21.Parajulus impressus (Say). Hefner, 1929, J. Morph. & Phys. 48( 1):153- 163, 4 pis.[?] Aniulus impressus (Say). Chamberlin, 1940, Bull. U. Utah. 30(11): 3.Aniulus venustus (Wood). Chamberlin, 1947, Proc. Acad. Nat. Sci. Phila. 99:36.Aniulus impressus (Say). Causey, 1950, Proc. Ark. Acad. Sci. 3: 46., figs. 7, 8.Some of the 14 millipeds described by Thomas Say were collected in Florida,others in Pennsylvania or from states in between. Unfortunately, he gave nolocality for J. impressus, the only species of family Paraiulidae described byhim, but later authors (Wood, 1865; Bollman, 1887, 1893) somehow deduced thateither Georgia or Florida was the type locality. Since the description containsno specific characters, it can be assumed that Say believed that all of theparaiulids which he encountered-and there are several in the area from whichhis collections were made-to be one species. For these reasons J. impressusSay must become a nomen nudum as of 1821. Aliulus bollmani , nomen novum, ishence proposed for a widely distributed and perhaps the best known Middle West-ern milliped, to which the trivial names impressus and venustus have been ap-plied for almost three-quarters of a century.H. C. Wood (1864, 1865) confused two species of Illinois paraiulids, aspointed out by Hefner (1929, p. 154). In his description of venustus, he showed19Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6Published by Arkansas Academy of Science, 19521•20 ARKANSAS ACADEMY OF SCIENCE'IIfigures of the male gonopods of venustus (1865, p. 197, figs. 26*-28) and thefemale genital apparatus (ibid., fig. 29) of another and more common species.That Wood was aware of some of this confusion is indicated by the followingstatement:"Itis most probable that I. venustus, W ood, is the species intendedto be indicated by Mr. Say under the name of impressus, although hisdescription is so meagre that it could be applied to other species.The locality would seem to fix it, however." {ibid., p. 197)C. H. Bollman (1887, p. 34) adequately described the male of the speciesthat Wood had drawn the female genital apparatus of and he designated it asimpressus Say, but unfortunately he did not realize that two species were repre-sented in Wood's description of venustus. He altered his position in a paperpublished (1893, p. 183) after his brief, brilliant career, in which he stated,but still erroneously, that "the true impressus is found in Indiana, Georgia,and Florida, while venustus is found in Colorado, Kansas, Minnesota, Michigan,Illinois, and Indiana."For his study of female paraiulids, Henry W. Brolemann (1922) used speci-mens obtained through H. V. Chamberlin. His figures 35-42, labelled venustus(Wood), are really the impressus of Bollman 1887, and figures 35-42, labelledimpressus (Say), are a species of Oriulus.Williams and Hefner (1928), Hefner (1929), and Causey (1950) applied thetrivial name of impressus to the species, and Chamberlin (1947) has usually usedvenustus.Aninlus bollmani is thus to be applied to the milliped which has most oftenbeen determined as Aniulus impressus (Say), after Bollman, 1887, who describedthe male, and Wood, 1864, 1865, the female. It is distinct from Oriulus venus-tus (VVood), as clearly indicated by Wood's figures of the anterior gonopods ofvenustus. Itcan be identified by the coxal lobes of the male gonopods, whichare in the form of irregular, chitinous plates, each rolled medially in the ver-tical plane to form a partially closed tube; also of specific value is the ser-rated inner curvature of the seminal blade of the posterior gonopods; normallythe seminal blades are contiguous medially, but they do not cross each other.The species has been identified by the writer from the following states: Ohio,Indiana, Illinois, Michigan, Minnesota, Wisconsin, and North Dakota; it probablyoccurs also in Pennsylvania. Its frequent occurence in fields of corn in dryweather has led to the common name of corn milliped.4niuIiis orientalis, n. spFigures 1-4One of the smaller members of the genus, with the male gonopods nearestthose of An. bollmani; distinguished from bollmani by the absence of serrationsalong the inner curvature of the seminal blades and by the coxal lobes, whichtogether form a single cuplike-like structure, much as in A. adelphus Chamberlin1940, rather than two open tubes.Male holo type. --Lateral margins of collum wide and straight, each with oneentire sulcus and a partial one. Vertical segmental sutures about the diameterof the pores from the pores and weakly curved. Anal spine straight, extendingslightly beyond anal valves. Sternal plate of eighth segment triangular, ex-tending almost to the posterior margin of the anterior gonopods (Fig. 4).Femur of anterior gonopods of the usual shape and size; coxal lobe rela-tively larger than in bollmani, laminate, roughly rectangular, with a keel onthe anterio-lateral surface (Figs. 1, 2, k), the mesial surface smooth and con-cave. Each posterior gonopod (Fig. 3) consists of a flattened seminal blade,sigmoidally curved, and of a shorter accessory blade. In situ the coxal lobesare almost vertical, the two forming a single large cup, open ventrad and cau-dad, around the posterior gonopods; the seminal blades are subvertical, contigu-ous, or approximately so near their apices, and the accessory blades probablycross at the middle as in adelphus.Diameter 1. 5 mm.Locality probably Durham, North Carolina; 2 males collected Dec. 9, 1939;N. Causey.20Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6https://scholarworks.uark.edu/jaas/vol5/iss1/6Explanation of FiguresAniulus orientalis, male paratype.Fig. 1. Left anterior gonopod, lateral view; k, keel on coxal lobe.Fig. 2. Same, cephalic view.Fig. 3. Right posterior gonopod, mesial view.Fig. 4. Sternal process of eighth segment.Aliulus rugosus (Bollman), male.Fig. 5. Left anterior gonopod, lateral view.Uroblaniulus stolidus, male holotype.Fig. 6. Posterior segments.Fig. 7. Gonopods, ventral view.Fig. 8. Left anterior gonopod, dorsal view.Fig. 9. Left posterior gonopod, dorsal view.21MILLIPEDS FROM THE EASTERN UNITED STATES21Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6Published by Arkansas Academy of Science, 1952r22 ARKANSAS ACADEMY OF SCIENCEGenus AliulusCausey 1950. Proc. Ark. Acad. Sci. 3:1.Aliulus rugosus (Bollman)Figure 5Parajulus rugosus Bollman, 1887, Ent. Amer. 3:81 (Myr. N. A., 70, 105).P. rugosus Bollman. Williams & Hefner, 1928, Ohio Biol. Sur. Bull. 18, p. 127figs. 19C, 20 A.The following notes on this rare species were made from a male of 56. seg-ments, diameter 2.6 mm, from Owen Co., Indiana, and from two females from Putnamand Calhoun Cos., Illinois. Determination of both sexes is made with some res-ervation until specimens from Pennsylvania can be studied.Posterior gonopods very similar to those of the genotype, AI. carrollusCausey 1950, but instead of a minute subterminal tooth on the seminal blades,there is a minute notch in the ventral margin. Seminal blades contiguous medi-ally, where they are flattened vertically; just behind the coxal lobes the endof each turns abruptly laterad and horizontally. The shorter accessory bladefollows the curvature of the seminal blade.Coxal lobe of anterior gonopods simple, subtriangular in outline, thickenedat the tip and along the posterior margin, and with a distinctive horizontalridge ectad (Fig. 5). The broad surface of the coxal lobe is outward, and bothit and the femur are almost perpendicular to the main body axis. This is incontrast to carrollus, in which the broad surfaces of the coxal lobes are hori-zontal and the cleft ends are contiguous medially.Sternal piece of eighth segment of male wide, the medial extension tongue-like as in carrollus.Female genital apparatus very similar to that of carrollus, with the ven-tral margin of the synoperculum unusually wide and rough. The sternites of thethird segment are cut off obliquely and higher up than in other paraiulids.Genus IIIiulus , emend.Causey 1950, Proc. Ark. Acad. Sci. 3:47.In the original description of this genus is the statement that "the poste-rior gonopods have no separate accessory blade, that structure probably beingrepresented by a ridge which arises at the base of the lateral surface of theseminal blade." This should be emended to read: Proximal half or more of ac-cessory blade fused with seminal blade, appearing as a ridge on the lateralsurface; the distal region of accessory blade simple and free as in relatedgenera.Illiulus illinoensisCausey 1950, ibid., figs. 13-17.In males collected in Jefferson and Yell Cos., Ark., the free portion ofthe accessory blade has a diameter of about one- third that of the seminal bladeat the point where they diverge; the accessory blade continues ventrad verti-cally, the apex reaching slightly below the lowest level of the outer curvatureof the seminal blade. These specimens differ slightly from the holotype in thatthe coxal lobes are a little longer and are without the slight undulations inthe lateral margins.Genus Uro b IaniulusUroblaniulus Attems. Chamberlin and Hoffman, 1950, Nat. Hist. Misc., No. 71, 6.U ro blaniulus s toIidus, n. spFigures 6-9This species is near dux (Chamberlin 1914). Itdiffers from dux in thatthe femora of the anteroir gonopods are not broad, the femora and coxal piecesare almost of the same length, and the coxal pieces do not "enlarge again alittle," nor are they "distally subtruncate;"unlike dux, the posterior gonopodsdo extend beyond the anterior. Anal spine shorter than in any other species ofthe genus and not curved.22Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6https://scholarworks.uark.edu/jaas/vol5/iss1/6MILLIPEDS FROM THE EASTERN UNITED STATES 23iMale holotype.- Lateral margin of collum with three entire sulci on oneside and two on the other. Eyes subtriangular, ocelli in 6 rows, 9 or 10 to 3ocelli in each row. Anal spine stout and short (Fig. 6).Femora of anterior gonopods weakly clavate, setae arranged in two areas(Pig. 7). Coxal pieces slightly excavated medially, abruptly narrowed distad,the apices obliquely truncate and almost as long as femora. Dorsally the coxalpieces have the usual lateral and medial folds (Fig. 8), the shape distinctivefor the species.Each posterior gonopod consists of four longitudinal pieces (Fig. 9): ven-trad are the medial, narrow piece and the lateral main piece with its distalmargin almost straight; dorsad are the medial, short piece and the long column,which is longitudinally striate, finely pubescent distally, and the longestpiece of the four. In ventral view the posterior gonopods are visible betweenand beyond the anterior.Diameter 1.6 mm., 46. segments, last 3 legless.Type locality.-Penninsula State Park, Door Co., Wise; one male Sept. 29,1951; Dr. and Mrs. H. W. Levi.Several specimens of U: immaculatus (Wood) were collected by the Levis thesame day from the same general locality.Genus P tyoiulus , emendChamberlin 1940, Bull. U. Utah 30 (11): 15-In all known species the posterior gonopod has a basal accessory branch.P tyoiulus ectenes (Bollman)Parajulus ectenes Bollman, 1887, Proc. U. S. Nat. Mus. 10:617 (Myr. N. A., 34).Ptyoiulus coveanus Chamberlin, 1943, Bull. U. Utah 34(6): 10, figs. 24-25.When Bollman wrote that the male genitalia of ectenes are entirely differ-ent from those of pennsylvanicus (Brandt), he obviously meant to imply only thatthe two species are separable on the basis of the genitalia. Specimens ofectenes from Raleigh and Durham, N. C. , correspond with Bollman' s description ofthe types except that the anal spine passes beyond the anal valves, as in otherspecies of the genus. The gonopods are distinguished from those of pennsylvani-cus and georgiensis Chamb. 1943 collected at Hockaway, N. J. , and Blount Co.,Ala., respectively, principally by the type of setae on the femora, the shape ofthe corolla, and the shape of the posterior gonopods. The setae on the ventralsurface of the distal region of the femora are, in pennsy Ivanicus and georgien-sis, of two types: medially there is an area of evenly short, fur-like setae;laterad the setae are of uneven length, but longer; between the two areas is ashort, longitudinal, glabrous ridge. In ectenes there is no fur-like area, thesetae are of irregular length, and there is no longitudinal ridge. The corolladiffers from that in other species in that it is smaller, flares less, it is notstriated, the margin is not serrated, and it is cut away to the base dorsally;inside the corolla, the apex is blunt rather than sharp and hooked. The mainpiece of the posterior gonopods differs from that in other species in that thedistal enlargement is smaller; the crook shown by Chamberlin (1943, fig. 25)appears when the piece dries. In ectenes the lateral margin of the distal halfof the penial plate are concave; in other species they are convex.Specimens of ectenes in the collection of the Illinois Natural HistorySurvey are from Goodlettsville, Tenn. , and from Pope, Hardin, and Gallatin Cos.,111. Diameter of adult specimens is from 1.5 to 1.7 mm.23Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6Published by Arkansas Academy of Science, 195224Journal of the Arkansas Academy of Science, Vol. 5 [1952], Art. 6https://scholarworks.uark.edu/jaas/vol5/iss1/6

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On Two New Species and New Distribution Records of Paraiulid Milipeds from the Eastern United States

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