NEPHERONIA. 20j 



ginous, the larger spots sometimes having silvery centres. 

 The female is p.iler, with the " orange-tip " much smaller, or 

 obsolete. 



As Mr. Trimen remarks, this Butterfly much resembles 

 another form inhabiting portions of South Africa, a true 

 " Orange-Tip," Callosune auxo, Lucas, but this is generally an 

 inch smaller, and may be distinguished at once by the sub- 

 costal nervure being only four-branched. 



The Eronia group seems largely to take the place of the 

 Butterflies of the East Indian and South American Callidryas 

 group, which has only one or two representatives in Africa, 

 just as Callosune replaces the genus Euchloe of the Palsearctic 

 Region. 



GENUS NEPHERONIA. 



Nepheronia t Butler, Cist. Ent. i. pp. 38, 53 (1870); Distant, 

 Rhop. Malay, p. 319 (1885). 



Dr. Butler proposed this genus to include the African N. 

 idotcea (Boisduval), which he indicated as the type, N. thalassina 

 (Boisduval), A r . argia (Fabricius), N. buque'ii (Boisduval), N. 

 pharis (Boisduval), and N. chione (Doubleday), and the Asiatic 

 N. hippia (Fabricius), N. iobcta (Boisduval), N. bcebera (Esch- 

 scholtz), and allies. The characters given for Nepheronia are 

 as follows : 



"Front wings occasionally sub-pyriform (N. pharis and 

 N. chione) ; upper disco-cellular strongly excavated, more than 

 half the length of lower, which is oblique and slightly angu- 

 lated. 



"Hind-wings: Upper disco- cellular more than half the 

 length of the lower, very oblique ; lower disco-cellular rather 

 less oblique and waved ; second and third median branches 

 wide apart. 



" Body moderately robust, slightly hairy ; palpi and antennae 



