208 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 90 



fuscous with a slightly darker subbasal band. Hind wing and cilia 

 pale ochreous-fuscous. Legs whitish ochreous, the fore tibiae and 

 tarsi shaded with fuscous. Abdomen yellowish brown above, whitish- 

 ochreous beneath. 



Hair pencil from first abdominal segment of male strongly 

 developed. 



Male genitalia. — Harpe slightly longer than twice its width; sac- 

 culus ill defined, narrow, weakly sclerotized. Anellus a broad, oval, 

 weakly sclerotized plate with a small, broadly obtuse, strongly scle- 

 rotized base; lateral fingerlike lobes hardly exceeding central plate, 

 broadly dilated distally. Aedeagus stout, acutely pointed. Vesica 

 armed with a large patch of strong, but slender, cornuti. 



Female genitalia. — Genital plate membranous except for a narrow 

 sclerotized band at anterior edge. Ostium small, round. Ductus 

 bursae slender, slightly sclerotized just before ostium and before 

 ductus seminalis; inception of ductus seminalis well before ostium. 

 Signum with 17 to 19 branches on each side. 



Alar expanse, 13-16 mm. 



Type. — In the Academy of Natural Sciences of Philadelphia. 



Type locality. — Pennsylvania ? 



Food plant. — Oak. 



Distribution. — Eastern United States and Canada. 



United States records 



District of Columbia: 6 $ $ , fj $ 9 (April, July, and August dates, 1900 and 



1910, A. Busck) :2$S (July 31, 18S5, C. V. Riley). 

 Illinois: Putnam County, $ (lO-VIII-1939, M. O. Glenn). 

 Maryland: Hyattsville, 2 $ $ (7-VII-1913, 21-VII-1913, A. Busck). 

 New Jersey: Anglesea, 2 $ $, 9 (V-30-1905, W. D. Kearfott) ; Essex County, 



Park, 9 ("20 May," W. D. Kearfott). 

 New York: Heliport, $ (l-VI-1902, H. G. Dyar) ; Ramapo, $ (27-V-1900. 



W. D. Kearfott). 

 Ohio: Cincinnati, 2 9 9 (14-VIII-1907; 29-V-1907, A. F. Braun). 

 Pennsylvania: Beaver County, 2 $ S, 2 9 9 (May 1900, Kemp coll.); New 



Brighton, ^, 29 9 (14-19-VIII-1903, H. D. Merrick). 

 Virginia: Great Falls, 9 (25-IX-1914, A. F. Kneale). 



Canadian records 

 Ontario: Ottawa (July 13-24, 1906; April 13-16, 1935, C. H. Young). 



Rema7'ks. — Although this and the following species closely resemble 

 each other they may be distinguished quite easily. The transverse 

 dark markings of querciceUa are broken and in the form of small 

 spots and there is usually a dark spot on the hind margin of the fore 

 wing at two-thirds. The transverse markings of ohsoletella are more 

 evenly strigose and the dark suffusion of the fore wing at two-thirds 

 is usually in the form of a band across the wing. 



The larva of querciceUa has the three thoracic segments darkened ; 

 in ohsoletella only the prothorax is darkened. 



