INSECTS ATTACKING CEREALS AND GRASSES. 



43 



guished from differentialis " in having two lateral, yellowish stripes 

 from the head to the extremities of the wing-covers." ( See Figs. 

 22 and 23.) It is usually not so abundant as differential^. 



LONG-WINGED LOCUST (Dissosteira longipennis Thomas). 



This locust, not until recently recognized as an injurious species, 

 because of its comparative rarity, more nearly resembles the mi- 



FIG. 21. LONG-WINGED LOCUST. 



gratory locusts of the Old World than any other of our American 

 forms. It is about two inches long from head to tip of folded 

 wing-covers, and measures about 3 inches from tip to tip of ex- 

 panded wing-covers. The wing-covers or forewings are irregu- 

 larly blotched with pale brown, and the hind wings are black, 

 excepting the clear apical third and a narrow, clear, marginal 

 border running back to the anal angles. This locust is a non- 

 migratory form, occasionally abundant on the plains of eastern 

 Colorado. It sometimes occurs in sufficient numbers in restricted 

 areas to destroy all vegetation (see Kansas Notes). 



Remedies. The following notes on remedial measures are 

 drawn from a pamphlet on "Destructive Locusts," by Dr. C. V. 



