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 differentialis. 



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. 



