414 PROCEEDINGS OF THE ACADEMY OF [Sept., 



ever, only in the replacing of the yellow lighter colors with shades of 

 light brown. In some individuals the caudal tibiae are much more 

 valgate than in others, while the inflation of the ventro-lateral carina 

 and the adjacent parts of the caudal femora is quite marked in the 

 male. A rather striking character of the coloration of this species is 

 the continuation of the internal black vertical genicular bar of the 

 caudal femora on the ventral surface, but not on the external face. A 

 blackish patellar spot is present on the caudal tibise of some specimens 

 and not of others. 



The specimens here studied have been compared with paratypic 

 material. 



This species was one of those which swarmed in the prairie grass. 

 In certain localities where the ground was somewhat damp it occurred 

 in countless numbers. 



Melanoplus alpinus Scudder. 



Mammoth Hot Springs, Yellowstone Park, 6,500 feet, Aug. 5, 1 d^. 



This specimen has been compared with material from the Big Horn 

 Mountains, Wyoming, and found to agree in all important characters. 



The specimen was taken on the summit of the first hill back of the 

 Mammoth Hot Springs Hotel. The ground in that locality was bare, 

 being but sparsely overgrown with short grasses. At the time, the 

 specimen was not noticed to be a desirable insect, and a search for 

 others was consequently not made. 



Melanoplus infantilis Scudder. 



Livingston, Park Co., Montana, Aug. 4, 1 ? . Electric, Park Co., 

 Colorado, Aug. 4, 1 9 . Mammoth Hot Springs, Yellowstone Park, 

 Aug. 5: at 6,215 feet, 3 c^, 1 9 ; at 6,500 feet, 2 d",! 9 . Knob Hill 

 Colorado Springs, Colorado, Aug. 22, 1 9 . Cripple Creek, Teller Co., 

 Colorado, Aug. 19, 1 d' . 



The Cripple Creek specimen of this diminutive species is smaller 

 than the Yellowstone males, while the lavingston specimen is more 

 grayish than any of the others. 



This species was found chiefly in the more hilly regions where vegeta- 

 tion was not luxuriant and it was nowhere abundant. 



Melanoplus minor (Scudder). 



Knob Hill, Colorado Springs, Colorado, Aug. 17, 1 d. Manitou, 

 Colorado, Aug. 23: at 6,300 feet, 1 d", at 6,700 feet, 8 d", 6 9 . One 

 female from Manitou has the caudal tibise dull purplish red, all 

 other specimens having these parts various shades of glaucous. 



With one exception all the specimens of this species were taken^on 



