PIERID.E. 75 



?. Closely resembles $ in marking; but much paler, 

 varying from yellowish, to almost pure, white ; the blackish 

 hind-marginal band on fore-wing sometimes rather broader. 

 Pink cilia, &c., as in $ . 



LARVA. " Velvety-green, with two lateral yellow stripes, 

 and with black dots on the segments. Feeds on various 

 species of Trifolium and other leguminous plants."* 



PUPA. " Green, with a yellow lateral line."* 



While the^above description of this Butterfly was in progress, I saw an 

 insect which I feel almost sure was this species flying through a street in 

 Cape Town. In England, this species is known to be most uncertain in its 

 appearance, being taken abundantly during some one season, and then for 

 several years remaining undiscovered, without any apparent cause to ac- 

 count for its disappearance. It is, therefore, possible that the same uncer- 

 tainty of appearance may characterise Colias Hyale in the South of Africa, 

 which would be a sufficient reason for my not having taken it. Mr. Lay-ard 

 informs me that specimens of this insect were in all the three collections 

 made in South Africa by Ecklon, Zeyher, and Drege. 



South Africa. Coll. S. A. Mus. 

 Sussex Coast, England. Coll. mini. 



" Continent of Europe. Siberia. Cachemere. Nepaul. 

 North Africa." Westw., Brit. Butt. 



Genus TERIAS. 



Terias, Swains. 

 Xanthidia, Boisd. 

 Pieris, Godt. 



JMAGO. Head rather small ; eyes prominent, naked ; palpi 

 very short, clothed with closely-fitting hair beneath, com- 

 pressed, scarcely projecting beyond forehead, which has two 

 short tufts of hair immediately below insertion of antennae ; 

 antennae slender, moderately long, ending in a compressed, 

 elongate, rather gradually-formed club. Thorax short, rather 

 slender, clothed with short hair. Wings large, of delicate 

 texture, fore-wings rather elongate, truncate ; costa strongly 

 arched at base ; apex not acute ; hind-margin more or less 

 convex ; anal angle more or less rounded ; inner-margin 

 slightly concave about middle. Hind-wings sub-ovate, trun- 

 cate ; costa much arched from base ; apical portion of wing 

 produced, but rounded ; anal angle rather marked ; inner- 

 margins meeting beneath abdomen, forming a slight groove 

 or channel. Abdomen long, slender, extending very nearly 

 to anal angles of hind-wings. 



LARVA. Elongate ; slightly attenuated towards head, 

 clothed with a short pubescence. 



* Westwood (Brit, Butt, and their Transf., p. 16). 



