54 



U.S. NATIONAL MUSEUM BULLETIN 261 



Species of Stictoscarta occur in Argentina, Brazil, Trinidad Island, 

 Colombia, and British Guiana. Specimens are rare in collections, and as 

 a result there are problems in associating males and females of the same 

 species. The distinction between S. sulcicollis (Germar) and iS". linearis 

 (Walker) in the key (p. 55), is weak. These species may be synony- 

 mous, but longer series are needed to establish this. 



Stictoscarta is related to Dictyodisca and Tunga, from both of which it 

 can be distinguished by its lack of an anteapical plexus on the forewings. 



Figures 41-43. — 41, Stictoscarta indebita Melichar, lectotype. 42, S. exoleta 

 Melichar, lectotype. 43, S. amazonensis, new species, holotype; both plates 

 shown in d. 



The identity of S. sulcicollis (Germar) is based on a specimen deter- 

 mined by Signoret (NMV). Figures 38a and 38i are from the lectotype 

 of S. ruficollis Schmidt. The female of S. dissimilis Schmidt illustrated 

 in figure 39i was compared with the lectotype. The illustration 

 (fig. 40) of the male pygofer of S. linearis (Walker) agrees with the 

 holotype, the other characters being as in S. sulcicollis. 



