206 LLOYDS NATURAL HISTORY. 



short, the latter slender with gradually formed compressed club, 

 sometimes flattened." 



The genus Nepheronia^ as thus constituted, includes at least 

 three well-marked groups of almost generic value. 



In the typical group the species are of considerable size, 

 measuring about three inches across the wings, which are 

 broad and only slightly denticulated, with the hind-margin of 

 the fore-wings slightly concave, and therefore the tip some- 

 what prominent. The colour is white, greenish-white, or 

 yellow, with more or less extensive black borders. The type is 

 N. argia (Fabricius), in which the male is greenish- white, with a 

 moderately broad black border at the tip of the fore-wings, 

 gradually diminishing, and not extending to the hinder angle, 

 The females are white or yellow, with broad black borders, 

 greatly indented on the inner side, and on the hind-wings al- 

 most macular. The yellow form of the female is N. idotaa 

 (Boisduval) ; the type of Nepheronia. N. argia is a common 

 West African species, but there are several allied species found 

 in various parts of Africa. 



The next group is represented by N, pharis, Boisduval, and 

 N. chione, Doubleday. These are much smaller Butterflies, 

 only measuring about two inches across the wings, which are 

 of a pure white, very slightly bordered with black towards 

 the tips of the fore-wings. The wings are entire, broad, and 

 rounded, and the Butterflies are delicately formed, and re- 

 semble those of the genus Leptosia. The outer half of the 

 hind-wings is mottled with greenish beneath. These Butter- 

 flies are found in West Africa, and are rather scarce in col- 

 lections. 



In the Eastern species of Nepheronia we again meet with 

 larger Butterflies, measuring two and a half or three inches and 

 more in expanse. The wings are longer than in the African 

 species, and in the fore- wings the costa is less arched, and the 



