244 



INSECT LIFE. 



male; in the second form the disk of the win<rs is 



o 



entirely black, but the black bands of the other form 



are faintly indicated by a darker 

 shade. The larva of this species is 

 represented by Fig. 212. It has 

 the curious habit of weaving upon 

 a leaf a carpet of silk, upon which 



FIG. 212. Larva of the 

 tiger swallow-tail on 

 its bed. 



FIG. 213. The zebra-swallow-tail. 



it rests when not feeding ; when nearly full grown, 

 instead of spinning a simple carpet as before, it 

 stretches a web across the hollow of a leaf, and thus 

 makes a spring bed upon which it sleeps. 



The zebra swallow-tail, Ipliiclidcs ajax (Ipk-i-cli'des 

 <?y<2;r).--This butterfly (Fig. 213) has the wings 

 crossed by several bands of greenish white. Three 

 distinct forms of this species occur; these differ in 

 size, in the length of the tails of the hind wings, and 

 in the time of appearance. The one figured here is 

 the early-spring form. 



