46 



FAEMEES BULLETIN 843. 



bud scar or adjacent to an offshoot. 

 Usually they are deposited in the i 

 main stem of the branch, but if the .1 

 branch is of a srood size some esrsrs 



Fig. ■')fi.— The hickory twig-girdlcr: Pupa at 

 left, larva at right. Enlarged. 



are to be found occasionally in offshoots. 

 After the insertion of the eggs in the twig 

 the puncture is sealed vnih a sMny, 

 gummy substance, and the beetle then 

 scars the tmg for a short distance below 

 the egg puncture. The number of eggs 

 per twig may range from 3 to40, althougli 

 occasionally a severed branch mthout 

 any eggs is found. Tlie egg stage lasts 

 about three weeks. 



Tlie larva) (fig. 56, at right), wliich are 

 wliitish, legless grubs, make little growtli 

 during the fall or ^^^nter months, but wit h 

 the advent of warm weather in the spring 

 they grow verj^ rapidly. In making their 

 tunnels in the twig (fig. 55, h; fig. 57) they 

 work usually toward the severed end and 

 feed only on the woody libers, leaving the 

 bark intact. During the late spring or 

 early summer most of the larvoe* make 

 a few circidar holes in the bark, from 

 which they cast out pellets of frass and 

 excrement. Just prior to transforma- 

 tion to pupa (fig. 56, at left) each larva 

 closes the end of its gallery with sliredded 

 shavings, making the pupation quarters, 

 from wliich the adult emerges by gna\\nng 

 a more or less circular hole in the bark. 



I A few larvrp may not transform until tho. second season. 



Fig. .57.— The hickory twig-girdlor: Lar- 

 val burrow in cut-ofl pecan twig. 



