THE CANADIAN ENTOMOLOGIST 105 



of this brood had apparently disappeared and all eggs had hatched. 

 The first adults developing from this brood of eggs were noted June 

 10, and they continued to develop until the early part of July. The 

 first eggs were deposited by the second brood of beetles about July 

 first and oviposition continued until the early part of August. The 

 adults de\eloping from this brood of eggs began to appear in the 

 latter part of Juh' and conti.rmed to develop until late August, after 

 which time, after feeding and copulating, they disappeared from 

 the plants, having gone into hibernation. 



Hibernation, according to Messrs. Leng and Davis occurs under 

 the loose bark or in crevices in the bark, as they have found them 

 abundanth' in such situations on Staten Island. Mr. Leng states 

 that while collecting ParnidcE in a pond at Bull's Head, Staten 

 Island, he picked up a piece of willow bark in the water and found 

 several specimens of this species attached to it. 



It will thus be seen that there were three broods of beetles dur- 

 ing the season, a hibernating brood which appeared in spring and 

 continued in evidence during May, a second brood which began to 

 be in e\idence about June 10 and continued to appear until well 

 along in Jul\". b\' which time the third brood of beetles had begun 

 to mature, and this brood continued in evidence until late August 

 or early September. Thus there were two complete broods of in- 

 sects in addition to the hibernating beetles. Owing to the fact that 

 the insects apparently lived for some time after maturing, and that 

 the period of o\'iposition of a given brood extended for some time, 

 with a resulting irregularity in development, there was more or less 

 overlapping of the broods. 



, It will also be noted from the foregoing record that it required 

 about a month's time for the insects to mature, but this will proba- 

 bly vary a few days one way or the other depending upon conditions 

 of temperature, food, etc. The length of the egg stage varied from 

 three to five days, and the early stages of the larva.^ were observed 

 to occupy about the same length of time, while the period of pupa- 

 tion consumed two to three days. 



The eggs of this species are laid in somewhat irregular masses^ 

 more or less circular or oval in outline and, almost without excep- 

 tion, on the underside of the leaves. Usually only one mass occurs 

 on a leaf but occasionally there may be two, and they are situated 



