EXPLANATION OF PLATE II. 
Fig. A. Side view of the female Hessian 
Fly, greatly enlarged. 
a, three joints taken from the middle of 
the antennae of the female; a'. the 
three terminal female antennal joints; 
a", the four basal, and a"\ the two 
terminal male antennal joints; b, a 
maxillary palpus; c. scales from the 
body and wingb; d, e, side and verti¬ 
cal view of the last joint of the foot, 
showing the claws and foot-pad or 
pulvillus between them, and the 
scales on the joint. Drawn by Mr. E. 
Burgess. 
Fig. B. Larva magnified, with the breast¬ 
bone in the 2d ring next to the head. 
B a, the breast-bone highly magnified; 
B b, head from beneath, enlarged; Be, 
larval spiracle and its tubercle and 
trachea leading from the spiracle. B, 
drawn by Mr. Riley; Ba., b, c, by Mr. 
Burgess. 
Fig. C. Side and front view of the pupa or 
chrysalis. Drawn by Mr. Burgess. 
The abdomen of the side view of pupa 
is rather long, as the insect, when 
drawn, was just emerging from the 
semi-pupa stage, which it assumed 
December 1st. 
Fig. D. The flaxseed, puparium, or pupa 
case. The line by the side of the com¬ 
plete figures denotes the natural 
length of the insect. 
