36 
two weeks. Tliese batch early in the spring and develop by a series 
of five skin molts between the time of leaving- the egg and the appear- 
ance of the perfect winged individuals. As a rule, pellucida prefers and 
remains upon damp meadow lands among the hills and mountains; 
but when it becomes unduly common it shows decided tendencies 
toward migrating, and then spreads out over the adjoining country into 
grain fields, garden, and pasture lands, just as do most of our other 
destructive species when they become excessively numerous. Thus far- 
this locust can not be said to have shown a tendency to move in cer- 
tain directions in preference to others at given times of the year, as 
does the Rocky Mountain or true Migratory Locust of the United 
States. A further study of the Pellucid-winged Locust will, without 
doubt, add many new facts in relation to its life-history and habits that 
we do, as yet, not know. 
THE LONG-WINGED LOCUST OF THE PLAINS. 
(Dissosieii'ci longipennis Thomas.) 
Fig. 19. — Dissostcira longipennis: a. female — natural size; b, anal characters — enlarged (original.) 
Perhaps the greatest surprise to entomologists in the shape of injuries 
caused by locusts in this country was that occasioned during the past 
summer by the insect named above. Although it has been known to 
entomologists for twenty years, and has been twice described, this locust 
has been considered as belonging with our rarer representatives of the 
family of locusts. As stated in the preceding pages of this report, 
longipennis is rather restricted in its range, being found only upon the 
plains of western Nebraska, Kansas, southeastern Wyoming, eastern 
Colorado, and northeastern Xew Mexico, at an elevation of from 3,500 
