868 
ANNUAL REPORT OF NEW YORK STATE SOCIETY. 
ARMY WORM. ITS PARASITES. 
above it black. There are two narrow bands also on the back of 
the abdomen or hind body, placed on the sutures or joints, and 
the slender stalk or petiocle of the abdomen is likewise black. 
This insect may very probably be a mere variety of a common 
and quite variable species, the Ichneumon suturalis or Black- 
jointed ichneumon-fly, described by Mr. Say in the Boston Journal 
of Natural History, vol. i. p. 226. It however has a bright sul¬ 
phur-yellow dot on each of the hind corners of the first segment 
of the abdomen, which dots do not occur in any of the several 
specimens which I at present have of the suturalis and of a spe¬ 
cies allied to and perhaps not distinct from it, the Ichneumon fer- 
rugator (or rust-colored ichneumon-fly) of Swederus. For the 
present, therefore, I am inclined to rank this as a distinct species, 
and accordingly ticket it in my collection, Ichneumon Leucanice, 
or the Army worm’s parasite, distinguishing the three insects 
which I have now alluded to as follows:— 
I. ferrugator, rust-colored throughout, with only the ends of 
the antennas black. 
I. suturalis, the body (thorax) rust-color, marked with black 
on its sutures. 
I. leucani.*:, the body black with only the base and apex on 
the upper side dark rust-color; and other characters as above 
stated. 
[Note. —In consequence of the delay which has attended the 
procuring of the illustrations of the foregoing Report, and the 
consequent issue of the volume in which it appears, much impor¬ 
tant matter has been added to it from recent observations; to 
make room for which it has been found necessary to withdraw 
some of the topics originally prepared for it, including an account 
of the Virginia joint worm, the fly of which is represented, plate 
i, fig. 1, the Angoumois moth, figs. 2 and 3 of the same plate, and 
the Hessian fly, for illustrating which plate iii has been prepared. 
These insects being of less interest at the present moment than 
those which here replace them, will be embraced in the next 
Report in the succeeding volume.] 
