REVISION OF THE OECOPHORIDAE — CLARKE 103 



wing is irrorated with black scales ; cilia ochreous-f uscous with many 

 lighter tipped scales. Hind wing light smoky fuscous, lighter 

 basally, underside heavily shaded with black toward apex ; cilia light 

 fuscous with narrow, dark, subbasal band. Legs, except tarsi, yel- 

 lowish ochreous shaded with blackish fuscous; tarsi blackish fuscous 

 annulated with yellowish ochreous. Abdomen fuscous and whitish 

 ochreous above and whitish ochreous below with broad, black, lateral 

 lines. 



Male genitalia. — Harpe long, moderately wide; cucullus pointed; 

 clasper long, stout, straight, reaching costa ; sacculus narrowly folded. 

 Anellus oval, truncated on posterior edge; lateral lobes weak with 

 few hairs. Vinculum rounded. Aedeagus long, curved, bluntly 

 pointed; vesica with large spinulate patch in basal half. Transtilla 

 a narrow sclerotized band with large, hairy, lateral lobes. Gnathos 

 an oval spined knob. Socii large hairy flaps. 



Female genitalia. — Genital plate long; anterior edge folded nar- 

 rowly. Ostium near anterior margin of plate. Ductus bursae long, 

 membranous; inception of ductus seminalis well before ostium. 

 Bursa copulatrix large with small signum. 



Alar expanse, 21-25 mm. 



Type.—\]. S. N. M. No. 52080. 



Type locality. — Plummers Island, Md. 



Food plant. — Ptelea trifoliata L. 



Remarks. — Described from the $ type and 51 $ and ? paratypes 

 as follows : 13 $ $ and 5 $ 9 , Plummers Island, Md. (March and 

 April dates, H. S. Barber and August Busck) ; Decatur, 111., $ and 

 2 9 5 (June 8-15, no collector) ; Cincinnati, $ and 2 5 5 (X-8-04, 

 X-8-07, VI-25-08, A. F. Braun) ; Clermont County, Ohio, 2 9 5 

 (VI-14-14, A. F. Braun) ; Point Pelee, Ontario, 13 5 5,8 55 

 (VII-15 to VIII-11-27, F. P. Ide; VII-30-31, G. S. Walley; VII- 

 27-31, W. J. Brown) ; Pelee Island, Ontario, 2 5 5 (VII-30-31, G. S. 

 Walley). 



Paratypes in U. S. National Museum, Canadian National collection, 

 and collection of Dr. A. F. Braun, Cincinnati, Ohio. 



This species has been mixed in collections, being placed vnider 

 eupatoHiella {=^ plummerella) ., argillacea., and nigrinotella. Ob- 

 scurely marked specimens of any of these species might easily be 

 confused. The long clasper which reaches the costa of harpe im- 

 mediately distinguishes the present species from the others. 



I am indebted to Dr. J. McDunnough for a long, reared series from 

 Point Pelee, Ontario, which has greatly supplemented the material 

 here. 



