167 



for the larvae in two bushels of nuts but that all had eaten their 

 way out and disappeared. 



In a lot of .26 ' ' wormy ' ' hazelnuts sent me by Mr. Bacon, 

 23 larvae had left the nuts on September 14th and only three 

 remained. Eighteen of the exit holes were within one-eighth of 

 an inch of the point of the nut and only two were directly on the 

 side. 



Mr. Bacon sent me one beetle which he collected from the 

 bushes on July 23rd. Hamilton, writing of observations made at 

 Allegheny, Pa., states that he did not obtain the beetles by beat- 

 ing hazel bushes previous to June 20th nor after July 15th. 

 Harris records that paired adults have been found on hazelnuts 

 in July. It seems from this evidence that most of the eggs are 

 deposited in July and that the beetles disappear soon thereafter. 



The eggs are eliptical in shape, the 

 surface smooth and shining and the color 

 translucent white. The single egg meas : 

 ured was .04 in. long and .028 in. wide. The 

 act of oviposition was not observed in this 

 species but eggs were found occupying 

 small cavities in the shell, only one egg 

 being found in a place. Feeding punc- 

 tures were found exending into the kernel but the egg-punctures 

 penetrated only through the shell and the eggs were found with- 

 in the shell but nearer the inner than the outer surface. In most 

 cases, but not always, the egg-punctures were found about the 

 point of the nut where the shell is accessible without first boring 

 through the involucre. 



At the time the larvae hatch the tender kernel is just be- 

 ginning to form and in several nuts larvae were found that ap- 

 peared to have been feeding on the delicate fiber that occupies 

 the cavity of the nut previous to the formation of the kernel. 

 The hole made by the beetle in the shell to receive the egg does 

 not entirely heal over and it was observed by Mr. Bacon that 

 the full fed larvae in forming their exit holes enlarge these old 

 wounds, where the shell is defective. After the larvae quit the 



