Plate III. 
Fig. A. Side view of the female Hessian Fly, greatly enlarged. 
a, three joints taken from the middle of the antenna of 
female; a 1 , the three terminal female antennal joints; 
the four basal, and a 111 , the two terminal male anten 
joints; b , a maxillary palpus; c, scales from the b 
and wings; cl, e, side and vertical view of the last j< 
of the fooc, showing the claws and foot-pad or pulvi 
between them, and the scales on the joint. 
Fig. B. Larva magnified with the ‘‘breast-bone” in the sec 
ring next to the head. 
B a, the breast-bone highly magnified; B b, head from hem 
enlarged; Be, larval spiracle and its tubercle and trac 
leading from the spiracle. 
Fig. C. Side and front view of the pupa or chrysalis. The abdoi 
of the side view is rather long, as the insect, w 
drawn, was just emerging from the semi-pupa stage wl 
it assumed December 1. 
Fig. D. The flaxseed, puparium, or pupa case. 
The line by the side of the complete figures denotes the nati 
length of the insect. (From 10th Report.) 
Plate IV. 
Fig. 1. 
Fig. 2. 
Fig. 8. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Parasite of the Hessian Fly, Pteromalus pallipes; magni 
eight diameters. (Original.) 
Parasite of the Hessian Fly, Pteromalus fulvipes; magni 
seven diameters. (Original.) 
The Wheat Midge, Diplosis tritici: a , male; b, female 
natural size; c, wing, greatly enlarged; d, antennal jc 
ol male; e, do., of female;/, ovipositor; g, eggs, gre 
magnified; h, flower of wheat, showing larvae on ker 
i, larva in repose; j, do., crawling; /^natural size 
enlarged view of anterior end when moving; l, posh 
end, with teeth protruding to aid in motion. (After Fit 
The Wheat Bulb Worm, Meromyza americana, larva; i 
nified sixteen diameters. (From 13th Report.) 
Pupa enclosed in puparium; magnified thirty diame 
(From 13th Report.) 
The same; ventral view. (From 13th Report.) 
Egg; magnified sixty diameters. (From 13th Report.) 
Imago, or adult fly; magnified twelve diameters. (F 
13th Report. 
Plate V. 
Fig. 1. The Grass Worm, Laphygma frugiperda: a, adult la 
b, head, front view; e, dorsal view of abdominal 
ment; cl, lateral view of abdominal segment. 
