look under that head in the older works fur description- of ihem.* 

 The foil Mule will aid in determining the males of the >pi 



mentioned 1 rule there will be but little, if an}-, trouble 



after the males are determined. 



minal segment of in..'. tly notrh 



B. Length of body to tip of - l /-35 i"'ii. 1.1.16-1.4 im i 



M. 

 BB. Length of body to tip of mm. (0.9-1 .04 ind 



M. WLA 

 .\.\. Ap x .'i last abdominal segment of male entire or i: 



l' A ..1 cerci enlarged at a] M. i I-.MOKATUS. 



BB. Anal cerci tapering. 

 C. Species of medium size ; anal cerci much narrowed, but without a i 



M. n MI k-i:rr.kfM. 



CC. Species of la anal cerci suddenly narrowed, inakir. 



inent right-angled notch on lower side. M. nil 



The Rocky Mountain Locust or Western Grasshopper, 

 sprctus. The most terrible of insect scourges that this country has 

 known have been the invasions of this species. Large areas 



,-. EpK-layinflr of the Rocky Mountain Locust, a, a, a, female in different positions, nviposii- 

 iny ; />. riTfj-pod extracted from the ymund. with the end t>r..k-n -pfn ; 



on the ^p.und ; de shows the earth ; ^ place, 



and - iced ; /"shows where su 



country have been -.ted. and the inhabitants reduced t 



-vation. The cause of all this suffering is not a 1.. 

 et. It i- rcprc -sciiteil natural sixe by 1 ; [t 1 



* F"; )'. "f di'- reasons for the adoption of the name Melanoplus, see 



paper by S. H. Sc udder, Proc. Bos: XIX. [>. B 



