lERIAS. 233 



before the end of the cell, the second near the end of the cell, 

 the third and fourth forming a rather long fork; upper discoidal 

 nervule thrown off at about one-third of the distance between 

 the cell and the tip of the wings. Hind-wings with the pre-costal 

 nervule more or less obsolete; sub-costal nervure bifurcating 

 about the end of the cell. 



The larva is moderately slender, C3lindrical, and pubescent ; 

 the pupa is straight, pointed at the ends, and very convex on 

 the back. 



This o-enus includes an immense number of small white and 

 yellow Butterflies, which inhabit the warmer parts of Asia and 

 Africa. There are several well-marked groups among them, 

 which must ultimately be divided into genera like their 

 American allies. Many species have a wide distribution, and 

 are very variable. They are all of a white or yellow colour, 

 sometimes with only the tip of the fore-wings black, at other 

 times with black borders varying in shape and width. On the 

 under side they are generally more or less flecked with brown 

 or ferruginous. The type, Terias /^^<f<2/'^ (Linnaeus), is a widely- 

 distributed East Indian Butterfly, with broad black borders, 

 wliich are broader towards the tip of the fore-wings, but below 

 the middle of the border it is deeply and squarely indented by 

 the yellow ground-colour in the manner of Sphceuogona mexi- 

 cana {cf. plate lix. fig. i). The border of the hind-wings is 

 narrower and regular. This is a very variable species. On 

 the under side it is distinctly spotted, but in the closely-allied 

 T. sa?'t\ Horsfield, and in some allied species, there is a large 

 square reddish-brown blotch at the tip of the fore-wings 

 beneath. The larva of T. hecabe is green, with a pale yellow 

 lateral stripe. It feeds on various species of yEschynome?ie, 

 especially ^. sesha?i. 



In another species, representing a different group, T. ca?idida 

 (Cramer), the wings are yellow above and below in the male, 



