ILLUSTRATIONS. 



Page. 



Fig. 1. Egg of bollworm t 



2. Cross section through the soil, showing i)upii of bollworm in its 



burrow 9 



3. Bollworm moth 19 



4. Area of bollworm injury in Texas, Indian Territory, and Okla- 



homa, 1906. 15 



290 



(6) 



