4 THE CANADIAN ENTOMOLOGIST. 
vation of a large number of larvæ, which appeared readily separable into 
two sizes, corresponding to those originally collected for breeding. West- 
wood, in his “ Modern Classification of Insects,’ (vol. 1, 238), states 
respecting the larva of an allied species (A. odscurus) which, in Europe; 
feeds upon the roots of wheat, rye, oats, barley and grass, that according to 
Bjerkander, a Swedish Naturalist, “it is ze years in arriving at the perfect 
state.” Curtis, in his “Farm Insects,’ (page 161) makes a similar state- 
ment upon the same authority, and adds that those which he had himself 
feeding for ten or twelve months scarcely increased in size during the 
time. As already stated, however, I am of opinion that our species is by 
no means so long lived, but that it attains maturity in three years—a 
period quite long enough, the agriculturist must think, in which to inflict 
damage upon the crops. 
Through the kindness of Dr. Horn, of Philadelphia, I am enabled to 
offer to the readers of the CANADIAN ENToMoLocisT the following careful 
description of the larva and pupa which, together with the accompanying 
illustrations, he has prepared from examples that I furnished him. I need 
only add that I have now another batch of larve in breeding, and that I 
hope next season to be able to afford some further information on points 
of interest connected with the life history of this destructive insect. The 
imago is described in Say’s Entomological books, vol. ii., p. 11T. 
Q 4terrreee re 
@ 7 SORA L | Cie Le 
WN 
1, Larva much magnified, (natural size | |) la. Transverse section. 2. Underside of 
head and first three or thoracic segments. showing the parts of mouth and the position of first 
spiracle. 3. Margin of front; a Position of antenne, 4. Mandible. 5. Leg. 6, Terminal 
segment beneath. 7. Pupa, upper and under view. The line between represents the natural size. 
LARVA (Fig. 1.) Æorm.—Elongate subcylindrical, dorsal surface more 
convex. | 
Tegument.—Partially corneous, colour testaceous. 
