72 BULLETIN 132, UNITED STATES NATIONAL MUSEUM 



Hind wing with normal pecten from lower median vein; 8 veins; 6 

 and 7 approximate toward base; 5 parallel with 4 or (in desotanum) 

 bent at base ; 3 and 4 connate ; inner margin in male roughly scaled 

 above and excavated below into a broad shallow pocket. 



Hind tibia of male dilated, heavily rough sealed and with a heavy 

 dorsal hair pencile from base above. 



Male genitalia as in Ecdytolopha except : spining of cucuUus en- 

 croaching on neck of harpe ; sacculus more weakly spined than neck. 



Abdomen of male with a pair of dorso-lateral yellow hair penciles 

 from caudal edge of second segment. 



Female genitalia with two strong thornlike signa. Ductus 

 bursae rather short; weakly chitinized at genital opening. Bursa 

 copulatrix with one or two strong chitinized patches on neck. 



Closely related to Ecdytolopha. 



KEY TO THE SPECIES OF GYMNANDHOSOMA 



1. Pale areas on outer third of fore wing, sordid whitish ; liind wing with vein 5 



straight (1) punctidiscanum. 



Pale areas on outer third of fore wing brownish ocherous; hind wing with 

 vein 5 bent at base (2) desotanum. 



1. GYMNANDROSOMA PUNCTIDISCANUM Dyar 



(Figs. 1, 3, 5, 38, 121, 341) 



Oymnandrosoma punctidiscanum Dyab, Proc. Ent. Soc. Washington, vol. 6, 

 1904, p. 60.— Kearfott, Proc. U. S. Nat. Mus., vol. 28, 1905, p. 362.— 

 Barnes and McDunnough, Check List Lepid. Bor. Amer., no. 7252, 

 1917.— Forbes, Memoir 68, Cornell Univ. Agr. Exp. Sta., 1924, p. 397. 



Resembles Ecdytolopha insiticiana, differing chiefly in the second- 

 ary sexual characters of the male and in having a strong white dot 

 on fore wing at end of cell. 



Genitalia figured from specimens in National Collection from 

 Quincy, 111. (Poling, male) and Washington, D, C. (Busck, "Aug. 

 1903," female). 



DistHhution. — Massachusetts, New York, New Jersey, Pennsyl- 

 vania, Maryland, District of Columbia, North Carolina, South Caro- 

 lina, Florida, Texas, Missouri, Illinois, Indiana. 



Alar expanse, — 16.5-25 mm. 



Type. — In National Collection. 



Type locality. — Washington, D. C. 



2. GYMNANDROSOMA DESOTANUM, new species 



(Fig. 123) 



Antenna blackish fuscous; basal joint black. Palpus extending 

 a trifle more than the length of the head beyond it ; blackish fuscous 

 slightly dusted with ocherous; upper edge sordid whitish. Face, 



