16 Journal New York. Emtomological Society. [Voi x. 



So far as the writer is aware nothing has been recorded in regard 

 to the life-history of this Ijeetle. 



Dr. Riley has contributed several short articles to the American 

 Entomologist on O. cin^i/hi/a which however are incomplete and 

 hence the following notes may be of interest. 



Eggs. — These were imbedded between the bark and wood in per- 

 forations made by the female beetle. The opening was closed by a 

 gummy secretion. The eggs are about two and one half millimeters 

 in length, of a whit'sh color, and oval in shape. Those under obser- 

 vation were laid in October of 1900 and hatched in about one month. 

 The time of hatching is not definitely known because we were an.xious 

 to rear the adults and so did not like to examine the eggs and thus 

 destroy them. Each egg is laid beneath a bud and rarely beneath a 

 small branch if it be not more than one year old. 



In every case coming under my observation or that of Mr. Brodie, 

 a peculiar scarring of the bark from the egg down the branch for two 

 or three inches was found. The female, after laying her eggs, digs 

 with her mandibles, transverse shallow grooves one-sixteenth to one- 

 eighth of an inch long in the bark, along the probable course of the 

 burrowing larva. These grooves are close together and give to the 

 bark its peculiar scarred appearance. No doubt it is done to deaden 

 the bark and prevent growth from crushing the egg. Where an egg is 

 laid beneath each bud, the series of grooves often extend from bud to 

 bud. Thus the whole severed portion may be scarred. Dr. Riley 

 mentions nothing of the kind in regard to O. cingitlata, and we con- 

 clude that the species differ in this particular. 



So far as observed the eggs are laid only in the severed portion of 

 the branch and I should expect this to hold true in every case. 



LarvcE. — These are white in color and from one-half to three- 

 fourths of an inch long. They vary much in size. In the first place, 

 I judge those destined to produce females are larger than the others. 

 In the second place a difference in the amount of nutriment obtained, 

 no doubt has something to do with the variation. 



When looked at with a lens the body is found to be sparsely clothed 

 with very short, dark, hairs. The mouth parts are black and pro- 

 trude. After hatching they soon burrow a little distance into the 

 wood anci remain there until warm weather. During the following 

 spring and summer they excavate galleries in the dead branch just be- 

 neath the bark. Occasionally one is found burrowing in the solid 



