r2o 



Plate III. 



Fig. A. Side view of the female Hessian Fly, greatly enlarged. 



a, three joints taken from the middle of the antenna of the 

 female; a^, the three terminal female antennal joints; a^^, 

 the four basal, and a'^i, the two terminal male antennal 

 joints ; ^, a maxillary palpus ; c, scales from the body 

 and wings ; d, e, side and vertical view of the last joint 

 of the foot, showing the claw^s and foot-pad or pulvillus 

 between them, and the scales on the joint. 



Fig. B. Larva magnified with the "breast-bone" in the second 

 ring next to the head. 



B«, the breast-bone highly magnified ; Hh, head from beneath 

 enlarged ; Be, larval spiracle and its tubercle and trachea 

 leading from the spiracle. 



Fig. C. Side and front view of the pupa or chrysalis. The abdomen 

 of the side view is rather long, as the insect, when 

 drawn, was just emerging from the semi-pupa stage which 

 it assumed December 1. 



Fig. D. The flaxseed, puparium, or pupa case. 



The line by the side of the complete figures denotes the natural 

 length of the insect. (From 10th Pieport.) 



Plate IV, 



Fig. 1. Parasite of the Hessian Fly, Pteromalus pallipes; magnified 

 eight diameters. (Original.) 



Fig. 2. Parasite of the Hessian Fly, Pteromalus fulvipes; magnified 

 seven diameters. (Original.) 



Fig. 3. The Wheat Midge, Diplosis tritici: a, male ; b, female : a\ 

 natural size; c, wing, greatly enlarged ; d, antennal joints 

 of male; e, do., of female;/, ovipositor; g, eggs, greatly 

 magnified; h, flower of wheat, showing larvte on kernel; 

 i, larva in repose ; j, do., crawling ; /, natural size ; k, 

 enlarged view of anterior end when moving ; I, posterior 

 end, with teeth protruding to aid in motion. (After Fitch.) 



Fig. 4. The Wheat Bulb Worm, Meromyza am&ricana, larva; mag- 

 nified sixteen diameters. (From 13fch Report.) 



Fig. 5. Pupa enclosed in puparium ; magnified thirty diameters. 

 (From 13th Report.) 



Fig. 6. The same ; ventral view. (From 13th Report.) 



Fig. 7. Egg; magnified sixty diameters. (From 13th Report.) 



Fig. 8. Imago, or adult fly; magnified twelve diameters. (From 

 13th Report. 



Plate V. 



Fig. 1. The Grass Worm, Laphygma frugiperda: a, adult larva; 

 h, head, front view ; c, dorsal view of abdominal seg- 

 ment ; d, lateral view of abdominal segment. 



