6 Dr. F. A. Dixey on 



the costa by a broad dusky band which may occupy the anterior half 

 of the cell. Marginal spots of the hind -wing much larger than 

 in the male. 



Underside as in the male, but with a conspicuous orange flush 

 at the base of the fore-wing, extending over the proximal two- 

 thirds of the cell, and showing faintly through on the upper surface. 



29 c^cJ, 4 $$ (Tiriki, Victoria Nyanza; and Toro, W. 

 Uganda), in the Hope Collection, Oxford. 



Fourteen of the males and all four females were captured by 

 Mr. C. A. Wiggins in the Tiriki Hills, N.E. of the Victoria 

 Lake, during February and March 1903. Fifteen males (also 

 presented by Mr. Wiggins) were taken by native collectors 

 in the Toro country, on the eastern slopes of Ruwenzori, 

 in November and December 1900. These are all recorded 

 by Mr. S. A. Neave, under the head of Belenois zochalia f. 

 formosa, Butl., in Novitat. Zoolog. vol. xi, 1904, p. 358. 



This is a very distinct form of the Belenois zochalia group. 

 It is easily distinguished from crawshayi, Butl., tanganyikae, 

 Lanz {formosa, Butl.), and diminuta, Butl., by the darker 

 apex and border of the fore-wing, from which the white 

 spots have almost disappeared in the male and have entirely 

 vanished in the female; the nearly immaculate white or 

 yellow of the hind- wing ; but especially by two features of 

 the under surface, viz. the great prolongation of the orange 

 costal streak, and the general character of the dark markings 

 on the hind-wing. In the other forms of the B. zochalia 

 group, these latter markings are linear, looking as if they had 

 been drawn with a pencil or stiff brush. When they become 

 faint or disappear, as in B. diminuta, they do so by attenua- 

 tion and curtailment. In B. victoria they look as if they 

 were made with a soft brush, and they become faint by 

 gradually melting, without diminution of size, into the 

 ground-colour of the wing. 



In the National Collection there are three males of this 

 form, two from Mount Elgon and one from Toro. They 

 are ranked as B. formosa, but differ in the points stated from 

 the type oi formosa beside them. 



