5§ HETEROCERA. 
MOCHLOPTERA. 
Mochloptera, Butler, Journ. Linn. Soc., Zool. xii. D. 386 (1876). 
This genus was founded by Mr. Butler for the reception of two insects, the one 
described by Perty, the other by Walker, who had both placed them in different genera 
from which they are clearly distinct. 
1. Mochloptera xanthocera. 
Gymnelia xanthocera, Walk. Cat. vii. p. 1608. 
Mochloptera xanthocera, Butl. Journ. Linn. Soc., Zool. xii. p. 886. 
Hab. Guatemata, San Gerénimo, Panzos, Senahu (Champion); Panama, Volcan de 
Chiriqui (Zrétsch). 
This species is very close to M. acrorantha, Perty, the only difference being, so far as 
I can see, in the colour of the antenne; in M. xanthocera they are pale citron-yellow, 
while those of Perty’s species are black, excepting the tips, which are pale yellow; in 
other respects they do not differ in the slightest degree. The type of Walker’s species, 
with which I have compared the specimens before me, is now in the Oxford Museum 
without any locality attached to it, though Walker gives Brazil as his locality in the 
description of this species in his Catalogue. 
So far asl at present know, the range of the northern form is from Guatemala to 
Panama, and of the southern one from Ecuador to North Brazil. 
COSMOSOMA. 
Cosmosoma, Hiibner, Samml. exot. Schmett. ii. t. 155. 
This genus has between twenty and thirty species placed in it, most of them from 
South America, though it is well represented in our country by about ten species, some 
of which are the same as the southern ones. 
1. Cosmosoma metallescens. 
Lemocharis metallescens, Ménétriés, Enn. Corp. An. Mus. Petr. ii. t. 14. f. 1%. 
Cosmosoma chalcosticta, Butl. Journ. Linn. Soc., Zool. xii. p. 887. 
Hab. Guatemaia, Las Mercedes (Champion); Panama, Chiriqui (Ridse), Bugaba 
(Champion).—Brazit }. 
Mr. Butler doubtfully places this species as a synonym of C. pheres of Cramer. I 
cannot agree with him. C. pheres of Cramer is a very different-looking insect; the 
primaries are much wider and the body larger, in fact itis much more robust. Cramer's 
species came from Surinam, and appears to me very different. I have a large series of 
specimens before me, and some of them have the spots bright brassy green, instead of 
blue-green as mentioned by Mr. Butler in his description of C. chalcosticta; this is more 
frequent in the females than in the males. Mr. Champion took the sexes of this species 
in copuld ; the female differs from the male by having the extremity of the abdomen 
