!»o.ll24. nt:i ISiny or the MELASorU—SClDDKR, 189 



hut partifiilaily in tlie soutlieni tMid of the valley; An^j^iist 2-,'i, Aiuer- 

 i<ai» Folk Canyon, Ttab, l>,."»0(M'eet: August (», Evsinston, Wyoiniiij^, 

 (i,SOO feet, plenty; Aujjust ll-UI, South Turk, Colorado, 8.000 to H^ooo 

 feet, every where, mature; Au«^ust 13. .Mount Liueolu, Colorado. 11,00() 

 to Li.OOO feet.iTowtlsof nymphs and ima;^os, as well as mavssesof <lead 

 imaj;os under stones at summit; August 17--2, Florissant. Colora<h), 

 8,0(M) feet; August U4, Pikes l»eak, Cohuado, 12,000 to i;i,000 feet; 

 August 24-lM, Manitou, Colorado. G,;>(M) feet; August 1M;, Colorado 

 Springs, Colorado, plenty: August 28-29, (larland, Colorado. 8.0IM) 

 feet, plenty; August 20, Sierra lilanea, Colorad«». below 10,000 feet, none 

 seen above timber; August -iO—'il, Tueblo, Colorado, 4.700 feet, plenty; 

 August 31, Animas, Colorailo; September 1, Lakin, Kansas, i>hMity. 



I have also seen specimens fiom tiie fcdlowing localities, which have 

 some special interest: Fort Hayes, ivansas, collected by J. A. Allen ia 

 June. 1871 (not heretofore reported in Kansas in this year); Preston, 

 Texas, Cajjtain Pope, ]May 1."), 1854 (uecessarily the i)rogf^nyof an invad- 

 ing Hight in a previous year, and none are recorded either in Texas or 

 Arkansas between 18r)0 and isr)3, inclusive); Ringgold P.arracks. (ui 

 the Lower Rio Grande, A. Schott. juesumably also in the s|)ring of 

 18.j4, when the ^lexican lioundary Commission was at work there; 

 Sonora, Mexico, A. Schott, and San Lorenzo, Chihuahua, Mexico, F. 

 Palmer, showing that it reaches Mexico, and that too even as far west 

 as Sonora. I have also a single specimen from California from Mr. II. 

 Kdwards, but it may have been taken in that part of the State east of 

 the Sierra Nevada. 



A tabular view of *' locust vears''for the different States will be 

 found in the lirst report of the Commission, page 113. 



This insect is normally single brooded; the eggs winter and the 

 earliest (those in warm exposures) hatch in Texas from the middle to 

 the last of March, and '• continue to hatch most numerously about four 

 (lays later with each <legree of latitude* north," so that in Montana and 

 Manitoba it is from the middle of ^lay to the first of June. This is in 

 the temporary region ; probably it is correspondingly later on the higher 

 levels of the permanent breeding grounds. The young reach maturity 

 in sixty to seventy-two days, to judge from those reared in confine- 

 ment, and after a few days coui»le, the female beginning to lay eggs in 

 about a fortnight thereafter. The eggs are laid in almost any kind of 

 soil, but by preference in bare, sandy places, arid in their permanent 

 home the}' show a preference for the shaded base of shrubby plants; 

 they are laid in a sort of pod, with a quadrilinear arrangement therein. 

 Several pods may be laid by a single female, Mr. Riley having on 

 three different occasions obtained two pods from single females in coq- 

 linement, laid at intervals of eighteen, twenty one, and twenty-six days, 

 respectively. 



The migratory instinct appears to be strongest within about three 

 weeks from the time of attaining maturity, or shortly before and during 



