LLUSTRATIONS. 
Page. 
Fig. 1.— Map of North America showing areas Infested by the chinch lmg_ 11 
2. — [mmature stages of t he chinch bug 21 
:>. — missus leucopterus: adult of long-winged form 22 
4. — missus leucopterus: adults of short-winged form 2:5 
5. — Com plant infested with chinch bugs 30 
6. — Nysius angustatus 31 
T. — Piesma cinerea 32 
8. — Corimela na pulicaria 33 
9. — Brachyrhynchus granulatus: larva, pupa, and adults 33 
1<». — Map showing areas in the United States over which the chinch 
hug occurs iu greatest abundance and may at any time become 
destructive 35 
11. — Map showing distribution of the chinch bug in Ohio in 189G 37 
12.- — Map showing distribution of the chinch bug in Ohio in 1897 38 
13. — Map showing distribution of the chinch bug in Ohio in 1894 39 
14. — Map showing distribution of the chinch bug in Ohio in 1895 and 
amount of precipitation over the State during May, 1895 40 
15. — Triphleps insidiosus 60 
16. — Mili/us cinctus 60 
17.- — Map showing probable course of diffusion of the chinch bug over 
North America 79 
18. — Blissus dorice: immature stages 83 
10. — Blissus doriw: adults 84 
