EURYAfcES. 241 



is exceptional in Butterflies, though it is the case in Drurya 

 antimachus (Drury), and in some other Butterflies. The male 

 has longer and narrower wings than the female. The fore- 

 wings are smoky-hyaline, broadly black at the base, and more 

 narrowly round the margins, with two very large roundish black 

 spots, one in, and one at the end of, the cell. The hind-wings 

 are slightly dentated, and are black, with a transverse white 

 band, divided by the nervures across the middle ; about its 

 centre is a black spot, of moderate size, at the end of the cell. 

 On the black space beyond the white band is a row of sub- 

 marginal red spots, and there is a row of marginal yellowish- 

 white spots. The female is really very similar in markings, but 

 has a very different appearance, being of a yellowish smoky- 

 hyaline, more strongly yellowish towards the base, where it is 

 black in the male. On the fore-wings the apex is broadly 

 dusky, and the black spots in and at the end of the cell are 

 very small. On the hind-wings the white band is hardly dif- 

 ferentiated from the general colouring of the wing, and the 

 sub-marginal spots are yellow instead of red. The female has 

 some resemblance to the common Australian Acrcea andro- 

 macha (Fabricius), which it is thought to mimic. 



The genus Euryades, Felder, which is confined to the 

 Argentine Republic and the neighbouring countries of South 

 America, is intermediate between Eurycus and some of the 

 more typical groups of South American Equitina, but it may be 

 distinguished by its peculiar neuration, the upper disco-cellular 

 nervule of the fore-wings being, instead of all the disco-cellu- 

 lars, very short, and the fourth sub-costal nervule rising from 

 the third beyond the cell, and the fourth and fifth forming a 

 rather short fork. The horny pouch of the female, too, is 

 peculiar. The fore-wings are triangular, and the hind-wings 

 are dentated, and, in some of the species, tailed. The type 

 is E. corethrus (Boisduval). 



10 R 



