ECOLOGY — INTERPRETATION OP ENVIRONMENT 359 



ing to lay her eggs, and she bored a hole with her ovipositor 

 so that her abdomen was deeply imbedded in the ground. But 

 when I approached, she withdrew her ovipositor. Afterward, 

 her body was found to contain sixty fully developed eggs. 

 She probably would not have laid all these eggs in one burrow. 



Thk Long-horned Locust 



This rather slender and inconspicuous locust frequents sandy 

 ground, where there is but scant covering of plant debris, 

 and usually but little vegetation. When startled from the 

 ground, in the sunlight, the red- winged individuals show the 

 flash of their pretty wings with considerable vividness. There 

 is also a yellow-winged form of this species, which may quite 

 easily be mistaken for the mottled sand locust, Spharagemon 

 wyomingianum, with which it is often associated. 



The male of the mottled sand locust and the female of the 

 long-horned species are nearly of the same size, making this 

 liability of confusion all the more likely. At Miller, Indiana, 

 September twenty-first, I found both of these insects beside 

 the main road, half way between the town and Lake Michigan. 

 Both species were seen on the sandy ground, which was more 

 or less mixed with gravel, and covered superficially by frag- 

 ments of twigs and a few plants, principally the burr grass, 

 Cenchrus trihuloides. 



The long-horned locust flies but a few feet when disturbed, 

 and then alights again on the ground, where its gray-varied, 

 colored markings are quite protective. I found this species 

 also on the sand about two hundred feet from the lake shore, 

 at Cheltenham, a suburb of Chicago. 



The three individuals from Miller, Indiana, shown in the 

 plate photographic illustration, page 361, will render the identi- 

 fication of this interesting species quite easy. Its geographical 

 range is east of the Mississippi River, covering the United 

 States and Canada. Its scientific name is Psinidia fenestralis. 



