390 LIFE STORIES OF AUSTRALIAN INSECTS. 



black margins; the under surface of front pair is 

 similar to the upper surface, but on the under side 

 of hind wings yellow markings are found. The 

 larva, when full grown, is brown, with yellow 

 tubercles scattered over it; when half grown the 

 head seems abnormally large. 



Food: Caper tree. 



The pupa (Plate 35, Fig. 5) is more or less erect, 

 with a girdle supporting it. The upper part ter- 

 minates in a distinct point; a few angular projec- 

 tions are on the abdominal region. In the 

 Newcastle district we saw a migratory flight which 

 was not in a mass but one after another every few 

 seconds. Their flight was down a valley, and the 

 butterflies kept the same side of groups of trees 

 which were present, never flying more than a few 

 yards out of the course of their predecessors. 



Another species is Delias nigrina. This is not 

 a migratory butterfly. The general colour of the 

 upper surface is a bluish- white ; the front pair of 

 wings has a dusky black patch with three white 

 blotches near the apex. The under surface is en- 

 tirely different from the upper: dusky black forms 

 the ground mass, with a bright yellow band across 

 the front wings and markings of bright red. 



Larvae are dark green and are gregarious; they 

 feed on the mistletoe {Loranthus). 



The pupae are erect, with a supporting girdle; 

 there is a pair of horns on the apex, and curved 

 spines are scattered over the surface. 



The **wood white" {Delias aganippe) is slightly 

 larger than Delias nigrina^ and resembles it. Note: 

 the dusky black on the front wings has 8 patches 



