384 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lis 



Gonioterma aesiocopia (Walsingham), new combination 



FiGUBES Ig, 2c 



Sienoma aesiocopia Walsingham, 1913, in Godman and Saivin, Biologia Centrali- 



Americana, vol. 42 (Lepidoptera-Heterocera, vol. 4), p. 179. 

 Sienoma aphrogramma Mej-rick, 1929, Trans. Ent. Soc. London, vol. 76, p. 515. 



Type localities: Veracruz, Mexico {G. aesiocopia)', Taboga Isl., 

 Panama, 200-1,000 ft. (6^. aphrogramma). 



Male genitalia: See figure Ig (slide WDD 2051, Kio Tempas, 

 Honduras). Uncus reduced, curved ventrad; gnathos incomplete, 

 basal process poorly developed, short, blunt; division of gnathal arms 

 near apex of process; tegumen moderately constricted; harpe rather 

 broad, saccular lobe broad, rounded at apex; anellar lobes broad, 

 pointed at apex; aedeagus narrow, vesica armed with two elongate, 

 convoluted clusters of small, heavy cornuti. 



Female genitalia: See figure 2c (slide WDD 2554, Porto Bella, 

 Panama). Genital plate membranous; ostium large, ostimn bursae 

 enlarged; ductus bursae long, wider than in G. exquisita or G. chlorina; 

 corpus bursae with two dentate signa; anterior margin of eighth ab- 

 dominal tergum as in G. exquisita. 



The short, blunt basal process and the division of the gnathal arms 

 near the apex of the basal process in the male genitalia distinguish the 

 males of G. aesiocopia. The differences in the females have been 

 discussed in the remarks under G. chlorina. 



Gonioterma argicerauna (Meyrick), new combination 



Figures le, f 

 Stenonia argicerauna Meyrick, 1925, Exotic Microlepidoptera, vol. 3, p. 221. 



Type locality: Cantinero, Colombia, 1300 ft. 



Male genitalia: See figures lej (slide WDD 2555, Colombia). 

 Uncus reduced, curved sharply ventrad; gnathos incomplete, basal 

 process poorly developed, short, blunt; division of gnathal arms well 

 below process; constriction of tegumen parallel-sided; harpe broad, 

 saccular lobe long, tapering to very sharp, slightly recm-ved point; 

 anellar lobes broad, sharply pointed at apex; aedeagus short, broad, 

 vesica armed with one elongate, convoluted cluster of small, heavy 

 cornuti. 



Female genitalia: Unknown. 



The parallel-sided constriction of the tegumen and the long narrow 

 saccular lobe that tapers to a sharply pointed apex serve to distinguish 

 the males from the other species. 



