121 



GREEN- VEINED WHITE BUTTERFLY 



Pontia Napi. 



PLATE IX. Fig. 1. 



Pap. Napi, i/wn — Lewin, pi. 27 — Donovan, viii. 23. pi. 28(1 

 fig. 1 Green-veined white, Harris. 



The wings of this species expand from 17 to 22 

 lines ; the colour white, inclining to yellow. The 

 tip of the primary wings is dusky, and in the male 

 tliere is around black spot near the middle, not very 

 remote from the outer margin, the female having two 

 such spots on each wing. The hinder wings are 

 free from marks, except the ordinary dusky spot on 

 the anterior margin. On the under side, the tip of 

 the primary wings, and the whole of the secondary 

 pair, are sulphur-yellow, the nervures stron gly mark- 

 ed with a dilated line of dusky green ; and there are 

 two black spots on the upper wings, near the hinder 

 margin. The body and antennae are nearly as in the 

 preceding species. 



The caterpillar feeds on tetradynamous plants, 

 paitirularly those belonging to the genus Brassica. 

 It is of a dull green colour, lighter on the sides, with 



o 



