GREEN-STRIPED LOCUST: A DOUBLE-BROODED SPECIES. 195 



ture insect had been extricated from the bent skeleton left behind. 

 They were in fact drawn over the bent knee-joint, so that during the 

 process they were doubled throughout their entire length. They were 

 as supple at the time as an oil-soaked string, and for some time after 

 extrication they show the effects of this severe bending by their curved 

 appearance. 



The molting, from the bursting of the pupa-skin to the full adjust- 

 ment of the wings and the straightening of the legs of the perfect insect, 

 occupies less than three-quarters of an hour, and sometimes but half an 

 hour. It takes place more frequently during the warmer part of the 

 morning, and within an hour after the wings are once in position, the 

 parts have become sufficiently dry and stiffened to enable the insect to 

 move about with ease; and in another hour, with appetite sharpened by 

 long fast, it joins its voracious comrades and tries its new jaws. 



Nearly all of the first brood of the hibernating individuals have 

 passed away by the first of August. Eggs had been deposited at vari- 

 ous times by those from about the first of June into July. The first 

 larvce of the second brood may be seen abroad as early as the latter 

 part of June, and continue to appear throughout the following month. 

 The earliest of these maturing and becoming winged about the loth of 

 August, would toward the latter part of the month deposit eggs for the 

 following brood. Oviposition continues through September, and in 

 September also, young larvae are again seen. These, from the lower 

 temperature of the advanced season, mature but slowly, and are destined 

 to pass the winter in their immature forms, some of them having pro- 

 gressed to their first pupal stage. They have been observed in Iowa, in 

 very large numbers, abroad in October and November. Mr. A. H. 

 Gleason, of Little Sioux, Iowa (N. Lat. 41" 50', and Isotherm of 48°) has 

 written as follows of them: 



They lay their eggs in August and September, and these hatch (at 

 least some of them) the same fall. I saw them last October and No- 

 vember, little fellows in spots of from one square yard to a twenty acre 

 piece covering the ground as thick as ever I have seen the Western 

 plague [Calopienus spretus]. I have found them in the winter, under 

 the leaves and dry straw and husks that have drifted up under the 

 fences and behind logs in the woods, in a dormant state, and upon warm- 

 ing them they would become brisk as ever {First RejJOrt U. S. Ento- 

 molog. Oommis., 1878, p. 459). 



A Double-brooded Species. 



It W'ill be observed that this species is an exception lo most of the 

 AcrididcB in its having two broods a year. That it is double-brooded 

 has not been previously published, but it follows from the observations 

 above recorded, and it is corroborated 1\v the following notes made by 

 Prof. Riley upon the species in Missouri, which he has kindly sent me, 

 for present use: 



