78 
SOME INSECTS INJURIOUS TO TRUCK CROPS. 
Fletcher, 11 in writing of this species, says that in Canada there are 
two generations a year, the first appearing in June and the second in 
August, The generation appearing in August is with little doubt the 
newly developed first generation, and, reasoning from analogy, i. e., 
from what we know of related flea-beetles, it is this generation of the 
beetle that hibernates ; thus the so-called " first generation " is simply 
that same generation reappear- 
following 
spring and 
ing the 
early summer 
As to hibernation, Piper 6 
and Doane 8 have recorded that 
the beetle passes the winter 
under stones or rubbish, in 
which respect it resembles 
practically all other species of 
American flea-beetles, and that 
with the first warm days of 
spring the beetles emerge from 
their winter quarters and im- 
mediately commence feeding 
voraciously upon their various 
food plants. 
The following account of 
the life history and habits of 
the species in the worst affect- 
ed locality in British Colum- 
bia has been kindly furnished 
by Mr. H. J. Quayle, who has 
also given an account of reme- 
dial experiments which sup- 
plement those previously fur- 
nished by conversation with 
Mr. Eder ; indeed, without the 
information supplied by these 
two gentlemen this article 
would be quite incomplete. 
Before transcribing Mr. 
Quayle's account it may be well to draw from it, according to the 
statement of Mr. H. Hulbert, Sardis, B. C, that this species made 
its first appearance as a hop pest in British Columbia in 1894 and that 
it has been of great importance for five years, or since about 1903. In 
regard to Mr. Hulbert's statement that the beetles disappear about 
June 1 and reappear the last of July, it is obvious that during that 
period the larvae are maturing, the pupae are formed, and the beetles 
of the first, or new, generation appear. 
Fig. 15. — Work of flea-beetle after vines are 
grown. (Original.) 
