A NEW BRAZILIAN MOTH — DUCKWORTH 383 



Described from male holotype, one male paratype, three female 

 paratypes. All paratypes with following data: Brazil, Sao Paulo, 

 S.P., Ypiranga (April 4, 1960, W. Bokemann). One female paratype 

 is in the Departamento de Zoologia, Secretaria da Agricultm-a, Sao 

 Paulo, Brazil. 



This species and the others included in this study — chlorina, aesiocopia, 

 algosa, fastigata, argicerauna, bryophanes — form a very closely related 

 group within the genus Gonioterma. The males of G. exquisita are 

 readily separable from the males of the previously mentioned species 

 by the absence, along vein la in the hind wing, of a hair pencil that is 

 present in the other species. Also, the forewing of G. exquisita has a 

 straight costa and white ground color, whereas the other species 

 mentioned above possess a strongly arched costa in the forewing and 

 lack a white ground color. 



The genitalia, although indicating an unusually close relationship 

 between G. exquisita and the other species included in this study, pro- 

 vide a number of distinguishing characters. The complete gnathos 

 and the broad harpe, with narrow, bluntly pointed saccular lobe, 

 serve to distinguish the males of G. exquisita. The short ductus bursae 

 in the female genitalia serves to separate the females. 



Gonioterma chlorina (Kearfott), new combination 



FiGUBES lc,d; 26 



Stenoma chlorina Kearfott, 1911, Ent. News, vol. 22, p. 126. 



Type locality: Sao Paulo, Brazil. 



Male genitaha: See figures lc,d (slide WDD 2052, Sao Paulo, 

 Brazil, type). Uncus reduced, curved sharply ventrad; gnathos in- 

 complete, basal process well developed, long, recurved, pointed; 

 division of gnathal arms well below process; tegumen narrowly con- 

 stricted; harpe narrow, saccular lobe broad, blunt; anellar lobes broad, 

 bluntly rounded at apex; aedeagus narrow, vesica armed with one 

 elongate convoluted cluster of small, heavy cornuti. 



Female genitalia: See figure 26 (slide WDD 2501, Sao Paulo, 

 Brazil). Genital plate membranous; ostiimi large, ostium bursae en- 

 larged; ductus bursae longer than in G. exquisita, more than half length 

 of corpus bursae; corpus bursae with two dentate signa; anterior mar- 

 gin of eighth abdominal tergum as in G. exquisita. 



This species and the following one, G. aesiocopia, are very similar in 

 coloration and general appearance. However, the long, reciu'ved, 

 pointed basal process and the division of the gnathal arms well below 

 the process in the male genitalia serve to separate the males of G. 

 chlorina from those of G. aesiocopia. The females are more difficult to 

 separate, but figures 26 and c indicate the size differences that will 

 distinguish the species in a majority of instances. 



