PLATE IV Page 



Fig. 1 Work of flea-beetles on a beet leaf 89, 91 



2 Adult Banded Flea-beetle, Systena taeniata Say (Enlarged) 92 



3 A flesh-fly parasite of grasshoppers, Sarcophage variacauda 



Coq. (Enlarged) 105 



4 Maggot of Figure 3 (Enlarged) 105 



5 Adult Potato Flea-beetle, Epitrix cucumeris Harr. (En- 



larged) 93 



6 Adult Three-spotted Flea-beetle, Disonycha triangularis 



Say (Enlarged) 93 



7 An immature female Field Cricket. 109, 1 10 



8 Grasshopper egg-pod 1 04 



9 Young Two-lined Hopper, Melanoplus bivittatus Say (En- 



larged) 100, 105 



10 Adult female Two-lined Hopper 100, 104 



1 1 Outline drawing of tip of female's abdomen, Two-lined 



Hopper, showing ovipositor 100, 104 



12 Adult male Differential Hopper, Melanoplus differentialis 



Thos., yellow phase 100 



13 Adult male Differential Hopper, black phase 100 



14 Adult Red-legged Locust, Melanoplus femur-rubrum De G. 100 



15 Outline drawing of last segment of male's abdomen, adult 



Red-legged Locust 1 00 



16 Hair Worm. A parasite of grasshoppers and other insects 



— somewhat enlarged. See also Figures 17 and 18, 

 Pages 107 and 108 107, 108 



Note: In case of enlargements, natural size outline 

 drawings are shown beside the colored pictures. Excep- 

 tions on Plate IV are Figures 9 and 16. 



