204 



THE MONTHLY BULLETIN. 



From the fact that so many eggs of Calliephialtcs sp. are found lying 

 in the cocoon away from the codling moth larva it is interesting to note 

 how long a newly emerged larva can live without food. Tahle 2 shows 

 the result of an experiment with newly emerged larva\ It will be seen 

 that the sliortest period was tw(Mity-two liour.s and the longest fifty-three 



Fig. 61. — Newly emerged first 

 stage larva of Calliephialtes 

 sp., greatly enlarged. (Orig- 

 inal. ) 



hours before death ensued, presumably from starvation. The average 

 longevity for the unfed first stage larva^ was thirty-one hours. 



TABLE NO. 2. 

 Longevity of newly emerged larvae unfed of Calliephialtes species. 



The newly emerged larvs are fairly active and are capable of crawl- 

 ing a short distance, one larva having been noticed to have traversed a 

 distance of 18 mm. The larva attaches itself to the host at any point 

 and begins feeding, the body rapidly approaching the width of the head 



Fig. 62. — First stage larva of 

 CalliephiaUes sp. after feeding. 

 Gr eatly enlarged. (Original.) 



and the contents of the alimentary canal become a deeper yellow color, 

 the whitish urates beginning to become noticeable. It may change its 

 point of contact, but is unlikely to do so unless disturbed. In this stage 

 the larva often feeds standing on its head, the body being pointed out at 

 I'ight angles to the point of contact. At the end of this stage the body 



