THE CANADIAN ENTOMOLOGIST. | 199 
genera so widely separated; and it would appear that Dr. Packard, usually 
sé correct in his statements, has, in this instance, allowed himself to fall 
into error. 
‘I am indebted to Mr. T. L. Mead, of New York, for determining the 
identity of this larva with that described in Packard’s Guide.—G. M. 
Dopce, Ohio, Il. 
TENT CATERPILLARS.—Apropos of the scarcity of the Tent Cater- 
* pillars this season: About ten days ago, an acquaintance informed me 
that the fences and sidewalks near the residence of Horace Yeomans, Esq., 
on Bridge Street, West Belleville, were covered by an immense swarm of 
Caterpillars. As I could not well go thither at that time, I sent one of 
my boys, who soon brought me about twenty specimens of the Forest 
Tent Caterpillar ( CAsiocampa Sylvatica. ) 
At my earliest convenience, some three days after, I visited the spot, 
and found some of them still clinging to the fence. At the same time, 
IT saw a remarkable example of their destructive powers. Near the 
N.E. corner of Mr. Yeoman’s grounds stands a remarkably well-grown, 
full-branched Oak tree, about two feet diameter at four feet from the 
ground, and rising to a height of some sixty feet; while its branches, 
extending full fifteen feet from the main stem, overspread, a space of over 
seventy square yards. In the spring and early summer, it as usual pre- 
sented to the eye a dense mass of luxuriant foliage—to-day it does not 
boast a single leaf; they are all eaten off to the midribs, which stilt adhere 
to the footstalks, and give the tree a most extraordinary appearance. It 
is evident that the migration of these caterpillars was occasioned by the 
exhaustion of their commissariat, which obliged them to seek “fresh 
fields and pastures new.” There must have been several broods to 
effect such an enormous defoliation, and indeed I found specimens of all 
sizes, from two inches down .to half an inch in length. Another Oak 
outside of Mr. Yeoman’s fence, near the S. E. corner of his lawn, is 
apparently undergoing the same process of denudation. I shall watch 
with interest the effect of these insect depredations on the health of the 
trees next season, and report the same for the ENTOMOLOGIST. 
BELL, Belleville, Ont., Aug. 19. 
Dawnais ArcuHippus.—I have often seen these tawny butterflies dis- 
porting themselves over the waters of the Kingston Bay some hundreds 
of yards from shore ; still I was quite surprised to see, early in August, 
two specimens flying boldly some seven and eight miles out from the 
