REVISION OF THE OECOPHORIDAE — CLARKE 193 



and mottled with fuscous except at joints. Abdomen pale ochreous 

 slightly infuscated above and with a fuscous line (sometimes rather 

 poorly defined) on each side beneath. 



Male genitalia. — Harpe broad, sparsely clothed with long hairs; 

 cucullus pointed; clasper very broad, wider than half the width of 

 harpe, terminating in two widely separated points, one of which ex- 

 tends beyond ventral edge of harpe ; sacculus short, narrowly folded. 

 Anellus a moderately sclerotized plate abruptly constricted posteriorly ; 

 posterior edge concave; anterior edge convex, produced laterally; 

 sides oblique; anterior end of anellus broader than posterior end. 

 Vinculum rounded. Transtilla a diamond-shaped plate with mod- 

 erately well-developed, hairy lobes. Aedeagus short, stout, with a 

 slight twist ; vesica armed with very fine spinules. Tegiunen and socii 

 greatly elongated, fused; socii with few hairs. 



Female genitalia. — Genital plate broad, moderately sclerotized with 

 a long roAv of hairs posteriorly; ostiiun a longitudinal slit between 

 Eaised edges. Ductus bursae a long membranous spiral; inception 

 of ductus seminalis just before the ostiiun. Bursa copulatrix large, 

 with a well-developed signum. 



Alar expanse, 20-22 mm. 



Type. — In American Museum of Natural History. 



Type localities. — "New York," "Pennsylvania." 



Food plant. — Corylus americana Wait. 



Distribution. — Northeastern United States and eastern Canada. 



United States records 



Maine: Sebec Lake, 2 $ S,2 $ ? (July 16-23). 

 New York: (no data). 

 Pennsylvania: (no data). 



Canadian records 



Manitoba: Aweme (July 8, 1925, R. Bird [rf. Corylus']). 



Ontario: Bobcaygeon (June 28, 1931, J. McDunnough [rf. Corylus]); Ottawa 



(July 27, 1905, July 21, August IG, 190G, C. H. Young; June 21, 1927, J. 



McDunnough ) . 

 Quebec: Aylmer (June 23, 1927, J. McDunnough [rf. Hazelwood]) ; Gracefield (no 



other data) ; Kazubazua (June 30- July 4, 1927, J. McDunnough). 



Remarks. — This and the following species {maculatella) are very 

 closely related. In superficial appearance groteUa is much darker 

 than maculatella and the males can be easily separated on genitalic 

 characters. The female genitalia of grotella have a long row of hairs 

 on the posterior edge of the genital plate and the ostium is consider- 

 ably shorter than the width of the genital plate; in maculatella the 

 row of hairs is reduced to about half a dozen and the ostium is much 

 longer. 



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