Laspeyresia lacustrina is described from four specimens, all female, captured in flight at two locations in Lower Michigan. On the exterior, the moth most resembles L. populana Busck and several other eastern species; its genitalia most resemble the western L. lautiuscula Heinrich. With wing length 8.4 to 9.4 mm, L. lacustrina is among the largest North American members of the genus

Miller, William E

English

ValpoScholar

The Great Lakes Entomologist 
Volume 9 
Number 4 - Winter 1976 Number 4 - Winter 
1976 
Article 1 
December 1976 
A New Species of Laspeyresia from Michigan (Lepidoptera: 
Olethreutidae) 
William E. Miller 
North Central Experiment Station 
Follow this and additional works at: https://scholar.valpo.edu/tgle 
 Part of the Entomology Commons 
Recommended Citation 
Miller, William E. 1976. "A New Species of Laspeyresia from Michigan (Lepidoptera: Olethreutidae)," The 
Great Lakes Entomologist, vol 9 (4) 
Available at: https://scholar.valpo.edu/tgle/vol9/iss4/1 
This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. 
It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. 
For more information, please contact a ValpoScholar staff member at scholar@valpo.edu. 
THE GREAT LAKES ENTOMOLOGIST 
A NEW SPECIES OF LASPEYRESIA FROM MICHIGAN 
(LEPIDOPTERA: OLETHREUTIDAE) 
William E. ~ i l l e r l  
ABSTRACT 
Laspeyresia lacusm'na is described from four specimens, all female, captured in flight 
at two locations in Lower Michigan. On the exterior, the moth most resembles L. 
populana Busck and several other eastern species; its genitalia most resemble the western 
L. lautiuscula Heinrich. With wing length 8.4 to 9.4 mm, L. 1acusm.na is among the 
largest North American members of the genus. 
Identification of Michigan State University olethreutids obtained in faunal surveys 
revealed four specimens of an apparently undescribed Laspeyresia from two Lower 
Michigan localities. The moth is named and described as follows: 
Laspeyresia lacustrina, new species 
FEMALE: Head. Length of labial palpus segment 2 approximately 0.9 eye diameter, 
segment 3 approximately 0.3 length of segment 2; scaling spreading, obscuring part of 
segment 3; scaling of palpus, front, and crown light brown. Thorax. Dorsal scaling brown, 
darker than head, most scales white-tipped; venter shining white, femora varying from 
pure white to light brown, tibiae and tarsi light brown banded with white. Tegula white 
anteriorly and posteriorly, brown medially. Forewing. Length 8.4 to 9.4 mm, 2.7 to 3.1 
times width at geatest dimensions; pattern as in Figure 1, costal area marked by 
approximately 10 apically angled white fasciae tinged with brown, dorsal area with fewer 
but wider white fasciae forming conspicuous markings near middle and tomus, one or 
two metallic fasciae in medial area of apical thud; fringe white to brown, a black line 
extending around termen; underside of forewing brown, paler than upper side. Veins Cul,  
M3, and M2 approximate at termen. Hindwing. Broader than forewing; apex acute, 
termen round; ground color brown, fringe white; underside of hindwing brown, paler 
than upper side. Veins Cul and Ma short stalked. Abdomen. Dorsal scaling shining brown, 
venter paler brown; genitalia as in Figure 3, sterigma rectangular in outline, caudal margin 
of ostium with a V-shaped indentation from sterigma, ductus bursae short, asymmetrical, 
with sleeve sclerotized % of its length; anterior apophyses longer than posterior 
apophyses; two thom-shaped subequal signa as in L. gallaesaliciana (Riley). 
MALE: Unknown. It will probably resemble the female exteriorly as sexual dimor- 
phism is not pronounced in Laspeyresia. Like the female, genitalia may resemble those of 
L. lautiuscula Heinrich. 
HOLOTYPE FEMALE: Michigan, Ingham Co., T. 4 N., R. 2 W., Sec. 35, 12 June 
1966 (Julian P. Donahue), genitalia preparation 404 (J. T. Eschle), in collection of 
Michigan State University, East Lansing. 
PARATYPES: Two females. Michigan, Berrien Co., T. 5 S., R. 19 W., Sec. 29, Grand 
Mere Dunes, 6 June 1968 (D. Cosper), genitalia preparation 66 (K. Lindstrom), wing slide 
XII.29.75 W. E. Miller), in collection of Michigan State University; same data as 
holotype, genitalia preparation 29 (K. A. Kohn) (NMNH 1685 l) ,  in National Museum of 
Natural History. One specimen not a paratype, same data as preceding except 15 June 
1968, on indefinite loan to the North Central Forest Experiment Station. 
Laspeyresia lacusm.na is similar exteriorly to L. populam Busck, L. flexiloqua 
Heinrich, L. garacana (Kearfott), and L. multilineata (Kearfott), but differs from all of 
lprincipal Insect Ecologist, United States Department of Agriculture, Forest Service, 
North Central Forest Experiment Station, St. Paul, Minnesota 55108. 
1
Miller: A New Species of <i>Laspeyresia</i> from Michigan (Lepidoptera: O
Published by ValpoScholar, 1976
172 THE GREAT LAKES ENTOMOLOGIST Vol. 9, No. 4 
these in female genitalia. In female genitalia, L. lacustrina resembles the western L. 
lautiuscula and the eastern L. gallaesaliciana, but differs from both these strikingly 
patterned species by its subdued forewing pattern (Figs. 1-2) and larger size. The above 
comparisons are based on types or on specimens I compared and judged to be conspecific 
with types, as well as on information in Heinrich (1926). 
The known fight period for L. lacustrim is June 6-15. The food plant is unknown, 
available specimens having been captured in flight. Typically, Laspeyresia are seed and 
inner b a ~ k  feeders on woody plants. In wing length, L. lacustrina is among the largest 
North American members of the genus. 
I thank Roland L. Fischer, Michigan State University, Julian P. Donahue, then of the 
same institution, and Richard L. Brown, Comell University, for generously providing 
specimens and assistance. 
Fig. 1. Laspeyresia lacustrina holotype female. Forewing length 9.4 mm. 
Fig. 2 .  L. lautiuscula male reared from Salix sp., Seattle, Wash. Forewing length 6.1 mm. 
Fig. 3. L. lacustrina female genitalia: sterigma and neighboring structures. 
LITERATURE CITED 
Heinrich, C. 1926. Revision of the North American moths of the subfamilies Laspeyre- 
siinae and Olethreutinae. U.S. Natl. Mus. Bull. 132, 216 p. 
2
The Great Lakes Entomologist, Vol. 9, No. 4 [1976], Art. 1
https://scholar.valpo.edu/tgle/vol9/iss4/1


A New Species of \u3ci\u3eLaspeyresia\u3c/i\u3e from Michigan (Lepidoptera: Olethreutidae)

Valparaiso University

The Great Lakes Entomologist Volume 9 Number 4 - Winter 1976 Number 4 - Winter 1976 Article 1 December 1976 A New Species of Laspeyresia from Michigan (Lepidoptera: Olethreutidae) William E. Miller North Central Experiment Station Follow this and additional works at: https://scholar.valpo.edu/tgle  Part of the Entomology Commons Recommended Citation Miller, William E. 1976. "A New Species of Laspeyresia from Michigan (Lepidoptera: Olethreutidae)," The Great Lakes Entomologist, vol 9 (4) Available at: https://scholar.valpo.edu/tgle/vol9/iss4/1 This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. For more information, please contact a ValpoScholar staff member at scholar@valpo.edu. THE GREAT LAKES ENTOMOLOGIST A NEW SPECIES OF LASPEYRESIA FROM MICHIGAN (LEPIDOPTERA: OLETHREUTIDAE) William E. ~ i l l e r l  ABSTRACT Laspeyresia lacusm'na is described from four specimens, all female, captured in flight at two locations in Lower Michigan. On the exterior, the moth most resembles L. populana Busck and several other eastern species; its genitalia most resemble the western L. lautiuscula Heinrich. With wing length 8.4 to 9.4 mm, L. 1acusm.na is among the largest North American members of the genus. Identification of Michigan State University olethreutids obtained in faunal surveys revealed four specimens of an apparently undescribed Laspeyresia from two Lower Michigan localities. The moth is named and described as follows: Laspeyresia lacustrina, new species FEMALE: Head. Length of labial palpus segment 2 approximately 0.9 eye diameter, segment 3 approximately 0.3 length of segment 2; scaling spreading, obscuring part of segment 3; scaling of palpus, front, and crown light brown. Thorax. Dorsal scaling brown, darker than head, most scales white-tipped; venter shining white, femora varying from pure white to light brown, tibiae and tarsi light brown banded with white. Tegula white anteriorly and posteriorly, brown medially. Forewing. Length 8.4 to 9.4 mm, 2.7 to 3.1 times width at geatest dimensions; pattern as in Figure 1, costal area marked by approximately 10 apically angled white fasciae tinged with brown, dorsal area with fewer but wider white fasciae forming conspicuous markings near middle and tomus, one or two metallic fasciae in medial area of apical thud; fringe white to brown, a black line extending around termen; underside of forewing brown, paler than upper side. Veins Cul,  M3, and M2 approximate at termen. Hindwing. Broader than forewing; apex acute, termen round; ground color brown, fringe white; underside of hindwing brown, paler than upper side. Veins Cul and Ma short stalked. Abdomen. Dorsal scaling shining brown, venter paler brown; genitalia as in Figure 3, sterigma rectangular in outline, caudal margin of ostium with a V-shaped indentation from sterigma, ductus bursae short, asymmetrical, with sleeve sclerotized % of its length; anterior apophyses longer than posterior apophyses; two thom-shaped subequal signa as in L. gallaesaliciana (Riley). MALE: Unknown. It will probably resemble the female exteriorly as sexual dimor- phism is not pronounced in Laspeyresia. Like the female, genitalia may resemble those of L. lautiuscula Heinrich. HOLOTYPE FEMALE: Michigan, Ingham Co., T. 4 N., R. 2 W., Sec. 35, 12 June 1966 (Julian P. Donahue), genitalia preparation 404 (J. T. Eschle), in collection of Michigan State University, East Lansing. PARATYPES: Two females. Michigan, Berrien Co., T. 5 S., R. 19 W., Sec. 29, Grand Mere Dunes, 6 June 1968 (D. Cosper), genitalia preparation 66 (K. Lindstrom), wing slide XII.29.75 W. E. Miller), in collection of Michigan State University; same data as holotype, genitalia preparation 29 (K. A. Kohn) (NMNH 1685 l) ,  in National Museum of Natural History. One specimen not a paratype, same data as preceding except 15 June 1968, on indefinite loan to the North Central Forest Experiment Station. Laspeyresia lacusm.na is similar exteriorly to L. populam Busck, L. flexiloqua Heinrich, L. garacana (Kearfott), and L. multilineata (Kearfott), but differs from all of lprincipal Insect Ecologist, United States Department of Agriculture, Forest Service, North Central Forest Experiment Station, St. Paul, Minnesota 55108. 1Miller: A New Species of <i>Laspeyresia</i> from Michigan (Lepidoptera: OPublished by ValpoScholar, 1976172 THE GREAT LAKES ENTOMOLOGIST Vol. 9, No. 4 these in female genitalia. In female genitalia, L. lacustrina resembles the western L. lautiuscula and the eastern L. gallaesaliciana, but differs from both these strikingly patterned species by its subdued forewing pattern (Figs. 1-2) and larger size. The above comparisons are based on types or on specimens I compared and judged to be conspecific with types, as well as on information in Heinrich (1926). The known fight period for L. lacustrim is June 6-15. The food plant is unknown, available specimens having been captured in flight. Typically, Laspeyresia are seed and inner b a ~ k  feeders on woody plants. In wing length, L. lacustrina is among the largest North American members of the genus. I thank Roland L. Fischer, Michigan State University, Julian P. Donahue, then of the same institution, and Richard L. Brown, Comell University, for generously providing specimens and assistance. Fig. 1. Laspeyresia lacustrina holotype female. Forewing length 9.4 mm. Fig. 2 .  L. lautiuscula male reared from Salix sp., Seattle, Wash. Forewing length 6.1 mm. Fig. 3. L. lacustrina female genitalia: sterigma and neighboring structures. LITERATURE CITED Heinrich, C. 1926. Revision of the North American moths of the subfamilies Laspeyre- siinae and Olethreutinae. U.S. Natl. Mus. Bull. 132, 216 p. 2The Great Lakes Entomologist, Vol. 9, No. 4 [1976], Art. 1https://scholar.valpo.edu/tgle/vol9/iss4/1

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A New Species of \u3ci\u3eLaspeyresia\u3c/i\u3e from Michigan (Lepidoptera: Olethreutidae)

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