41 



Their nest has its mouth close to the corn they are eating, but may run on the 

 ground an inch before going down. It consists of a web case, to which the dirt 

 adheres. They are doing tlioir worst work on a piece of ground on which rye was grown 

 last year. I often find two or tiiree of them to a single hill of corn. They are 

 mostly small, but I have found a few over an inch in Iciiigtli. 



Glenwood, Cook County, 111., June 15, 1888. I send you inclosed some cots 

 which are supposed to belong to the web-worm. I broke; up and planted to corn 

 seventeen acres of timothy sod that had been seeded about twelve years, and I find 

 these cots lying around on this ground. The cutworms are so plenty that they do 

 not let the corn get much above ground. 



I'KJ. 20. The Common Sod Web-worm 

 (Cramhus triseclus), back and side views, 

 Much enlarged. 



K I a. 22. The 

 Striped Sod Web- 

 worm (C r a ni b u 8 

 naiUibilis). Much en- 

 larged. 



Fkj. 21. The Common Sod Web-worm 

 {Cramhus trisectus), adult. Slightly en- 

 larged ■ 



Fig. 23. The Striped Sod Web-worm {Crom- 

 bu8 mutabilis), adult. Enlarged. 



Four species have thus far been l^rcd froru {'orii, uamcly, Cramhus 

 trisectus Walker (Fig. 20, 21), C. luteoldlus Clem., C. mutabilis Clem. 

 (Fig. 22, 23), and C. vulgivagellus Clem. 



Besides the injuries to corn, grass, and oats already mentioned, wheat 



