THE CANADIAN ENTOMOLOGIST. 105 



removal of a sheet of bark, from a dead White Pine, disclosed over a 

 hundred beetles of this species. They were congregated in several 

 groups that averaged approximately a dozen specimens. The 

 debris produced by the boring of bark beetles furnished the material 

 among which they had found shelter. As less than a couple of 

 square feet of the tree was stripped, there is no doubt that many 

 more were hibernating beneath the bark on the remainder of the tree. 



It is safe to assume that several factors were operative in 

 in causing the collecting, at one place, of such a large number of 

 beetles of the same species. Either the situation chosen by them 

 may have presented ideal conditions for hibernation and thus 

 proved attractive to many specimens, or this species may be gre- 

 garious in its winter habits. Also the proximity of High Park would 

 ensure, in the neighborhood, a luxuriant growth of various plants 

 furnishing suitable feeding grounds for aphids during the summer, 

 a circumstance that would react favourably on the production of 

 the ladybirds. 



On November 20th, the date upon which the observation 

 was made, the beetles had not become entirely dormant, but, when 

 disturbed, showed slight signs of activity. 



A. CosENS, Toronto, Ont. 



Hepialus thiile at rest. — I had occasion, last July, to keep a a* 

 H. thule alive for a couple of days, and noticed that, in clinging to 

 the sides of the box or to branches, the first two pairs of legs only 

 are used. The hind pair, which bear the great tufts of scent 

 distributing hairs, are drawn up alongside of the body. This is 

 shown in the reduced sized photo of the moth accompanying Mr. 

 Swainc's article in Can. Ent. XLI, 337-343, pi. 10, fig. M (1909), 

 but the position is always head up. 



I do not recollect seeing any reference in our literature to this 

 habit. A. F. Winn, Westmount, Que. 



A New Enemy of Poplars and Willoivs in Neiv Jersey. — During 

 the past few summers, a small greenish-blue ChrysomelJd was 

 observed feeding in considerable numbers on poplars and willows 

 chiefly in nurseries at Arlington, Elizabeth, Irvington, and several 

 other northern New Jersey points. Very little attention was paid to 

 it, inasmuch as it was assumed to be a native species. It turned out^ 



