ILLUSTRATIONS 
Page. 
Fig. 1. — Map of North America showing areas infested by chinch bug 11 
2. — Immature stages of chinch bug 19 
3. — Blissus leucopterus — adults of long and short winged forms 20 
4. — Blissus leucopterus — adults of short-winged seashore form 20 
5. — Corn plant infested with chinch bugs 28 
6. — Map showing areas in the United States over which the chinch bug 
occurs in most destructive numbers 31 
7. — Map showing distribution of chinch bug in Ohio in 1896 32 
8. — Map showing distribution of chinch bug in Ohio in 1897 33 
9. — Map showing distribution of chinch bug in Ohio in 1894 34 
10. — Map showing distribution of chinch bug in Ohio in 1895 and amount 
of precipitation over the State during May, 1895 35 
11. — Triphleps insidiosus Say ":; 
12. — Milyas cinctus Fab 54 
13. — Xysius (uigustatus 64 
14. — Piesma cinerea 65 
15. — Corimclana pulicaria 65 
16. — Braehyrhynchus yranulatus — larva, pupa, and adults 65 
17. — Map showing probable course of diffusion of chinch bug over North 
America 72 
18. — Blissus doria'— immature stages 76 
19. — Blissus doriw — adults 76 
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