67 



river-lagoon ; and I never saw the species in the woods of that immediate 

 neighbourhood. When the insect is alive, the eyes are of a brilliant green 

 colour, but this fades into a chestnut-brown soon after death. 



Knysna. Plettenberg Bay. Coll. mini. 



Natal. Coll. S. A. Mus. 



King William's Town. Coll. W. S. M. D'Urban.* 



Sierra Leone. Congo. Coll. Brit. Mus. 



" Amazoulu Country." Boisd. 



* " Occurs from Graham's Town to King William's Town, and beyond." 

 D'Urban, in litt. 



Genus CALLIDRYAS. 



Callidryas, Boisd. 

 Colias, Godt. t Swains. 



IMAGO. Head of moderate size ; eyes prominent, smooth ; 

 palpi rather short, compressed, not so hairy as in Eronia 

 (being clothed with short smoothly-lying hairs), converging 

 at tips, which are rather acute ; antennce rather shorter than 

 in Eronia, gradually thickening into an elongate, cylindrical 

 club, truncate at tip. Thorax tolerably robust, clothed with 

 long, silky pubescence. Wings much as in Eronia, perhaps 

 less broad proportionally, their margins very slightly crene- 

 lated ; hind-wings not so rounded, both apical and anal 

 portions being more prominent, giving these wings a more 

 truncate appearance ; the inner-margins meeting and gene- 

 rally quite concealing the under surface of abdomen, 

 forming more of a groove than in Eronia. 



LARVA. Elongate ; smooth or with short hairs ; slightly 

 attenuated at extremities ; usually of some shade of green. 



PUPA. Thick in the middle, very acute at both extremi- 

 ties ; the head being peculiarly beaked ; a projecting ridge 

 on the back of the thorax ; the position of the wings promi- 

 nently indicated. Usually green or yellow. 



These characters of the earlier states of the insects of this 

 Genus are taken from figures of the Larvae and Pupae of 

 several Indian species in the " Catalogue of the Lepidopterous 

 Insects in the Museum of the Hon. East India Company " 

 (1857). 



This Genus, which contains a considerable number of 

 highly beautiful Butterflies, seems to be an essentially 

 tropical one, only a few species straying into temperate 

 climates. But two species are recorded from extra-tropical 

 South Africa, one of which is bright-yellow, and the other 

 greenish-white. I have only seen the former of these on the 

 wing ; its flight was exceedingly rapid. 



