attacks of the insects. Indeed, during July, I found many roots of 

 corn burrowed lengthwise by nearly full-grown larvse, but never- 

 theless not killed by this violence. 



The adult was first seen by us this year, July 21, at which time 

 pupa3 and full-grown larvae, together wdth others not matured, were 

 abundant in the earth. Eggs were again found in the earth about 

 standing corn stalks in October of this year, dead adults occurr- 

 ing at the same time under leaves and in the ground. 



The damage inflicted by this insect has in some cases within my 

 observation amounted during the last year to a nearly total loss of 

 the crop, one farmer reporting a rapid falling off in the yield 

 from sixty bushels to six per acre, owing evidently to the ravages 

 of this insect only. 



In extreme Northern Illinois, I detected, in July, the notorious 

 WHEAT MIDGE, (probably the most destructive of wheat insects), in 

 fields of spring wheat then just ready for harvest. Considerable 

 damage had been done to here and there a field in that vicinity. 

 The importance of a general knowledge of the characters and halD- 

 its of this most destructive pest is so great, that I have prepared a 

 brief synopsis of the essential facts relating to it for this Report. 



In autumn, in fields of fall wheat, occurred a sudden irruption 

 of a caterpillar which had not attracted attention in Illinois 

 for more than a dozen years. This species, almost universally 

 mistaken by farmers for the army worm, was the grass worm, 

 {Laphygma fnujiperda), sometimes called also the fall army worm. 

 It ate to the ground large tracts of winter wheat, and where these 

 areas were not resown, the ground still remains bare. The larvae 

 went into the earth in October, and most of them are passing the 

 winter in the pupa stage. 



The WHEAT STRAW WORM {Isosoma tritici) still remains a growing 

 evil where winter wheat is raised, and an additional species of very 

 similar habit, called the greater wheat straw worm {Isosoma 

 grandc), was discovered by us this year in Central and Eastern 

 Illinois. 



The wheat bulb worm, an outbreak of which occurred two years 

 ago in Fulton county, has not been found seriously injurious since, 

 except in a field of rye this fall, in central McLean county. This 

 grain was sown in July as pasture for stock, — a fact which confirms 

 my former supposition with respect to the injurious effect of early 

 sowing, where injury by this insect is to be anticipated. 



A new enemy to corn (the root web worm) which I first 

 detected last year, was not bred to the imago until the present 

 season. In abundance where occurring, and magnitude of its 

 injuries, it promises to become one of the most important pests of 

 the corn grower. An article upon this insect is published upon another 

 page. 



The imported cabbage worm (Pieris rapce), although still notably 

 injurious, has been clearly less so this year than for several years 

 preceding, owing unmistakably to the general prevalence and extreme 

 destructiveness of the cabbage- worm disease mentioned in the intro- 



