42 



THE CANADIAN ENTOMOLOGIST. 



Fie. 



When this moth is at rest — that is, during the day time — its wings are 

 closed like a roof over its back, and its tufted fore legs are stretched out. 



The insect passes the winter in the chrysalis state, emerging as a moth 

 from the middle of June to the middle of July. The earliest recorded 

 date we have of the appearance of the moth is June 25th. It is usually 

 common during the last week in June and the first in July, when it may 

 often be found in the day time fast asleep on the leaves of the grape 

 vine. 



Soon after the moths appear they begin to deposit their eggs. These 

 are among the prettiest and most beautiful of insect eggs ; at e, fig. 7 

 (after Riley) we have a view of the upper surface, and at / a side view 

 of this charming object. It is 

 round and very flat; its color is 

 yellowish or greenish yellow, with 

 an enclosed ring of black placed a 

 little beyond the middle, and some- 

 times nearer to the outer margin. 

 In the centre of the egg is a large, 

 nearly round dot, and at a little distance from this a circle of smaller 

 dots, from which arise a series of from 24 to 27 raised striae, diverging 

 equally as they approach the outer edge, and crossed by many gracefully 

 curving lines which interlace also the spaces between. 



When mature, the young caterpillar escapes from the upper part of the 

 egg, lifting the centre and rupturing the portion placed over the black 

 ring. In some cases we have observed the egg shell to be eaten by the 

 newly hatched larva ; in others it remains almost untouched. The young- 

 larvae have a strange habit of twisting their hinder segments and throwing 

 them forward, resting on the anterior segments in a curious manner. At 

 this age they eat small holes all over the vine leaves in different parts ; 

 they are often solitary, but sometimes two or three may be found on a 

 single leaf. 



When mature, the full grown larva appears as at a, fig. 7 ; it is then 

 nearly one and a half inches long, tapering towards the head, thickening 

 towards the posterior extremity. The head is of an orange color, with a 

 few round black dots and pale brownish hairs. 



The bod)* above is pale bluish, crossed by bands of orange and many 

 lines of black. Each segment, excepting the terminal one, is crossed by 

 an orange band, all of which are nearly uniform in width, excepting that 



