151 
rank growing. In northern Ohio I never find hordei far below the 
upper joint, an exceptional feature I believe, though it seems to ine 
we might look for such a state of affairs, as it oviposits during a sea- 
son intervening between the spring and summer broods of tritici. 
Then, too, I notice the parasites of hordei, at least Uupelmus allynii 
French, Semiotellus chalcidiphagus Walsh, and Websterellus tritici Ash- 
mead, emerge in August and oviposit in the same straws from which 
they themselves emerged, the adults from these emerging in spring. I 
have also noted the same thing in the two former species where their 
host was the Hessian Fly. In both instances, however, I got fewer 
parasites in spring than in August. 
So far as measures for their control are concerned, tritici can be 
largely overcome by a rotation of crop, while both this and hordei will 
be destroyed by burning the stubble, a measure equally applicable to 
the Hessian Fly and Wheat Stem maggot, Meromyza americana. In 
— ^^M^w^lX^^w dk* 
I \C 1 1 "**Am\\> | \\\^^»'Tl^-- jS > 
Fig. 4.— Showing area of continued serious ravages by Chinch Bugs. (Webster del.) 
some portions of the country, however, clover is sown among the young 
wheat in early spring, and a burning over in summer under such con- 
ditions is impracticable. 
I wish to call attention to a few points in reference to the Chinch 
Bug, Blissus leucopterus. The area of extreme continued injury by this 
pest covers southern Minnesota, southeast South Dakota, much of 
Nebraska and Kansas, all of Iowa, and much of Missouri, Illinois, all 
of Indiana except northeastern portion, extreme southwest Ohio, and 
northern Kentucky (Fig. 4), though in the wheat region of the Mis- 
sissippi Valley the pest is by no means limited to this area, nor does it 
confine itself to the wheat region at all. 
9052— No. 2 7 
