COMMON BUTTERFLIES OF THE PLAINS OF INDIA. 1133 



Forewing with vein 10 emitted from subcos- 

 tal vein, not stalked with 6, 7, 9. 

 '. Hindwing without a precostal vein 

 . Hindwing with a precostal vein, 

 a". Forewing with vein 11 emitted from 

 the subcostal nervure half-way be- 

 tween base and apex of the cell 



¥. Forewingwith vein 11 emitted from sub- 

 costal nervure nearer apex than base. 

 a''. Forewing with vein 9 very short, 

 given off so near the outer margin 

 of wing as to be nearly absent 

 sometimes . . 



Terias. 



Catopsilia. 

 (Fig. 20.) 



Pier is. 



(Fi^ 



21.) 



Fiar. 20. 



Fig. 21. 



U\ Forewing with vein 9 longer, always 



given off well before margin of wing. 



a~. Male without specialized tufts of 



stiff hairs on anal segment at 



base of clasper ventrally, easily 



discernible 



Appias. 



(Fig. 22.) 



