( 341 ) 



tjgaia, 2 (?(?; Nyangori, November 1—8, 1 ^ ; Usemi, May 1—7, 1 c? 2 ? ?. 

 Ihe Jeniales are of a more transparent white colour than the males. 



Evidently allied to C. cy/Z/cc' Hopff. and C. yregori Butler, but differs in the 

 distribution of black markings on both sides, especially at base of wings. 



:pmBii>AE. 



26. Mylothris tirikensis spec. nov. (PI. I. f. 9). 



Apparently allied to M. riieppeUi Koch. 



?. Upperside.- Forewing : ground-colour white, base of wing nearly to 



extremity of ceil and extending slightly along inner margin, ochreous red, heavily 

 dusted especially in region of cell with dark scales. Costal edge black and linear, 

 widening considerably at apex, and following distal margin breaks up into two 

 spots at extremities of first and second median nervules. One small spot at 



extremity of submedian nervure. Hindwing pale sulphur-yellow at base, 



slightly dusted with dark brown scales. On distal margin six small black spots 

 at ends of nervules. 



Underside. Silvery white. Base of forewing nearly to extremity of cell 



and base of costa of hindwing bright orange. At apex and distal margin of 

 forewing at end of nervules seven, on hindwing six small black spots. 



Expanse, 43 mm. 



This peculiar little species, of which we have a single ? from the Tiriki Hills, 

 26. ii. 03, is probably nearest to M. rueppelli Koch, from which it differs in 

 the much smaller size, in the dusting over of the base of both wings with dark 

 scales, giving it a very different appearance, and in the relatively heavier black 

 marking of apex of forewing. 



27. Pinacopteryx dixeyi spec. nov. (Pi. I. f. 10). 



White, with black margins and spots. 



c?. Upperside. Forewing creamy white. Costal edge black and linear, 



widening at apex, narrowing as it follows distal margin, ending in two small 

 spots at extremities of second median nervule and submedian nervure. Hind- 

 wing as forewing, with seven circular black spots on distal margin at end of 

 nervules, with a small additional one between those on second median uervulo 

 and submedian nervure. 



Underside. Base of both wings and costa of hindwing, especially at base, 



flushed with orange. At apex and distal margin of forewing seven black spots, 

 becoming smaller toward anal angle. Faint subapical yellow streaks between 

 nervules of both wings. 



? differs in slightly larger size— 51 mm. nearly. Base and costa of forewing 

 dusky. Apex and distal margin of forewing broader but less black, interrupted 

 by rather ill-defined yellow internervular streaks. Both wings less heavily scaled 

 and more transparent. 



Expanse, 49 mm. 



