FELT, E P

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,(NEW JAVANESE GALL MIDGES -by~. P. FELTAlbany, N. V. U. S. A.The following descriptions are based upon a small collection of insectskindly submitted for study by Dr. W. DOCTERS VAN LEEUWEN, Directorof the Botanical Oardens, Buitenzorg, Java, under date of July 15, 1920.The collection is of special interest since it has brought to light a veryinteresting new genus and has given additional data respecting the habitsof the oriental Orseoliella,a genus which breeds in several grasseslt should be noted in this connection that many of the gall midgeswere forwarded· in some preserving fluid which apparently affected thecircumfila in such a way that the ordinary processes of mounting in balsamresulted in their disappearance, and therefore, made it very difficult to bepositive in regard to these structures..•Thorodiplosisn.g.This genus is tentatively placed in the Bifili though further study mayshow that it belongs in the Trifili. It may be easily distinguished from(ill other known genera by the very long, narrow wings, the producedantennae, the simple claws with an almost right angled curve, and theshort lobed ovipositor, type T. impatientisn. sp.In the SifiH, this genus runs to Thllrauia from which it is easilyseparated by the short, non-chitinized ovipositor. The tendency towardsmall, cyclindrical antennal segments distally in the malesuggests an affinitywith ProdiplosisFELT and it is possible that the genus will ultimately be placedin this series. Unfortunately the two males have been so manipulated thatit is impossible to refer the genus to one or the other of these sub-tribes.ThorodiplosisimpatienHsn. sp.The minute midges were received from W. DOCTERS V. LEEUWENunder date of July 15th, 1920 and labelled 21, Impatiens platypetala Lind!.Tjibodas, Mount Oedeh, 1500 m. Bull. Jard. Bot. Buitenzorg series III,volume 1, page 49, No. 599. An illustration of the gall shows· it to bea marginal leaf roll on the upper surface. (Fig. 599).90 TREUBIA VOL. II, 1.Mal e. Length 3.5 mm. Antennae 1/2 longer than the body, thickly haired, yellowishtransparent, 14 segments, the 5th with stems3 and 31/2 times theirdiameter respectively.The basal enlargement pyriform, the distal enlargementwith a length about 1/2 greaterthan its diameter, each with a whorl of long, stout setae and presumably with amoderately long circumfilum, the 10th and following segments having the basal portionof the stem with a length about 21/2 times its diameter, the distal enlargementcyclindrical, somewhat produced and with a length over twice its diameter and thedistal portion of the stem with a length 4 times its diametel, terminal segmentsomewhatproduced, irregular, the basal portion of the stem being represented by a narrowconstriction; the distal enlargement sowewhat produced, and apically bearing a longstout, tapering setose process. Palpi, first segment moderately long, irregular, th~second with a length about 3 times its diameter, the third 1/2 longer, more slenderand the fourth a little shorter and more dilated than the third. Mouth parts producedas narrow, piercing organs with a length about 1/2 the vertical diameter of the head;body yellowish, wings hyaline, very narrow, with a length about 3 times the width,the third vein uniting with the margin well beyond the apex,halteresand legs yellowishtransparent, claws moderately long, stout, curved at nearly right angles, simple, thepulvilli a little shorter than the claws. Genitalia; basal clasp segment moderately long,slender, with an irregular lobe basally, terminal clasp segment as long as the basalclasp segment and rather stout, dorsal plate broad, triangularly emarginate, the lobesobliquely truncate; ventral plate long, broad, broadly and roundly emarginate.Fern ale. Length 3 mm. Antennae a little longer than the body, sparsely haired,pale yellowish, 14 segments,the 5th with a stem about as long as the sub-cyclindricalbasal enlargement,which latter has a length about 4 times its diameter and a distinctconstriction near the basal third; ba.§al enlargement of the terminal segment with alength about 21/2 times its diameter and apically with a moderately stout, taperingprocess. Mesonotum brownish yellow. Scutellum, postscutellum and abdomen yellowish,legs yellowish transparent, ovipositor short, the terminal lobes narrowly oval andsparsely setose, other characters nearly as in the male.Type Cecid. A. 3153N. Y. State Museum.Orseoliellaorientalisn. sp.The specimens were received from W. DOCTERS V. LEEUWEN underdate of July 15th, 1920, labelled 20, Oplismenus compositus P. S., Sui-tenzorg VI, 1920, Alt. 250 m. New gall D. v. L. I) This species is verydistinct from O. javanicaKIEFF. and probably so from O. graminis FELT sinceit presents well marked colorational and certain structural differences inthe female. A series of both sexes would be necessary in order to establishthis definitely.M aI e. Length 3 mm. Antennae a little longer than.the body, thickly haired,lightbrown, 14 segments, the 5th with stems 11/2 and 31/2 times their diametersrespectively.Basal enlargementpyriform,thedistal enlargmentsub-cyclindrical, with a length overtwicethe diameter and slightly constricted near the basal third. Pal pi, first segmentshort,subquadrate, second broadly oval, the third 1/2 longer, more slender, the fourth a littlelonger and more slender than the third. Mesonotum reddish brown. Scutellum andpostscutellum yellowish, abdomen yellowish brown, halteres pale yellowish, coxaeandI) A Ie af-sheath gall as may be found on different grasses. D. v. L.•FELT: New Javanese-Gall Midges. 91legs pale straw, claws moderately long, slender, strongly curved, the pulvilli as longas the claws. Genitalia; basal clasp segment long, with a distinct basal lobe ; terminalclasp segment rather long, stout, nearly straight; dorsal plate short, deeply and trial)-gularly emarginate; ventral plate long, broad and broadly rounded apically.Fern aI e. Length 3.5 mm. Antennae extending to the 5th abdominal segment,sparsely haired, light straw, 14 segments, the 5th wit a stem about '/4 the length ofthe cyclindrical basal enlargement, which latter has a length 31/2 times its diameter;terminal segment produced, the basal enlargement with a length over thrice its diameter,and apically a moderately stout fusiform appendage about 3/4 the length of the enlar-gement. Mesonotum reddish brown. ScuteIlum and postscutellum yellowish, abdomenlight reddish brown, the short. ovipositor yellowish, the lobes broadly oval andsparselysetose,coxae and legs pale straw, otherwise nearly as in the m,!le.Pup a. (Female.) Length 3.5 mm. Slender, antennal horns long, triangular, wingcasesfuscous, extending to the third abdominal segment, leg cases to the sixth abdo-minal segment,abdomen yellowish orange.Type Cecid. A 3152 N. Y. State Museum.Parallelodiplosisjavanican. sp.The midgesdescribedbelowwerereceived underdateof July 15th,1920from W. DOCTERS V. LEEUWEN. They were labelled 18,PanicumindicumL., BuitenzorgVI, 1920. Undescribedgall, ') D. v. L., Alt. 250 m. Thespeciesappearsto be new and is tentativelyreferredto the above genus.M aI e. Length 2.5 mm. Antennae o~ half longer than the body, thickly haired,light brown, 14 segments, the 5th with stems each with a length about 2'/4 times thediameter. The basal enlargement sub-globose, the distal enlargement with a lengthnearly twice its diameter, sub-cyclindrical. Circumfila moderately long, stout, terminalsegment produced, the basal portion of the stem with a length fuHy 5 times jtsdiameter,the distal enlargement sub-cyclindrical, with a length 2'/2 times its diameter,apically a rather stout fusiform appendage. Palpi, first segment short, roundly quadrate,the second a little larger, subquadrate, the third one half longer, more slender andthe fourth a little longer and more slender than the third. Mesonotum dark reddishbrown. Scutellum and postscutellum yellowish brown. Abdomen yeIlowish, wingshyaline, ha!teres yellowish transparent, legs mostly pale straw, claws moderately long,stout, strongly curved, the pulvilli longer then the claws. Genitalia; basal claspsegment rather long, stout, terminal clasp segment short, stout, swoIlen basally;dorsal plate short, broad, deeply and triangularly emarginate, the lobes tapering to anarrowly rounded apex; ventral plate rather long, broad, narrowly rounded apically.Fern aI e. Length 3 mm. Antennae extending to the sixth abdominal segment,sparsely haired, light brown, 14 segments. The 5th with a stem '/3 the length of thecyclindrical basal enlargement, which latter has a length about 3 times its diameter.Terminal segment produced, the basal enlargement with a length 3 times its diameterand apically a stout fusiform process. MesoilOtum dark brown. Scutellum and postscu-tellum yellowish, abdomen yeIlowish brown, the ovipositor short, yeIlowish, the ter-minal lobes narrowly oval and sparsely setose. Halteres yellowish transparent. Coxaeand legs light straw, other characters nearly as in the male.Type Cecid. A 3150 N. Y. State Museum.') A leaf-sheath gall. ,.I92 TREUBIA VOL. II, 1.Parallelodiplosispaspalin. sp.This specieswas receivedfrom W. DOCTERS V. LEEUWENunderdateof July 15th, 1920 and labelled. 19, Paspalum scrobiculatum Hook,BuitenzorgVI, 1920.New gall, 1) D. v. L., Alt .250m.The genericreferenceis tentative.M a I e. Length 3 mm. Antennae '/4 longer thanthe body, thickly haired,light brown,14 segments, the 5th with stems 2'/z and 3 times their diameters repectively. Basalenlargement sub-globose, distal enlargement with a length one half greater than itsdiameter and a distinct constriction near the basalthird, circumfila ratherlong. Terminalsegment produced, the basal portion of the stem with a length 5 times its diameter,thedistal enlargement sub-cyclindrical, with a length 3 times its diameter, apically with aslender fusiform appendage. Palpi, first segment short, stout, irregular, the secondirregularly triangular, the third with a length '/z greater than its diameter, ovoid, thefourth '/z longer than the third, rather broad. Mesonotum yellowish brown, scutellumand postscutellum yellowish brown, abdomenyellowish. Genitalia slightly fuscous, wingshyaline, halteres yellowish basally, fuscous apically, legs pale straw, claws ratherlong,slender, strongly curved; simple, the pulvilli as long as the claws. Genitalia; bas.alclaspsegment moderately long, stout, terminal clasp segment short, stout. Dorsal plate short,broad, broadly and triangularly emarginate.Ventral plate broad,broadly roundedapically.Fern a I e. Length 3 mm. Antennae nearly as long as the body, sparsely haired,dark brown, 14 segments, the 5th with a stem '/3 the length of the cyclindrical basalenlargement, which latter has a length 3'/z times its diameter. Terminal segmentproduced, the basal enlargement with "a length 4. times its diameter and apically aslender, tapering process, slightly swollen basally. Mesonotum reddish brown. Scutellumand postscutellum yellowish, abdomen yellowish brown, halteres whitish transparent,legs pale straw, ovipositor short, the terminal lobes narrowly triangular and sparselysetose, other characters nearly the same as in the male.P u'p a. Length 3 mm.,ratherslender,antennalhorns prominent,wing casesextendingto the third abdominal segment, leg cases nearly to the tip of theabdomen,both brownor dark brown. The abdomen yellowish brown.Type Cecid. A 3151 N. Y. State Museum.I) A leaf-sheath gall.,.I•

NEW JAVANESE GALL MIDGE

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NEW JAVANESE GALL MIDGE

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