1906.] NATURAL SCIENCES OF PHILADELPHIA. 411 



noticeably smaller than the others examined. No short-winged in- 

 dividuals have been seen. 



This species was found in many localities, but nowhere more common 

 than in the prairie grass outside of Colorado Springs. The brilliantly 

 colored specimens (M. plumbeus Dodge) were always found in the 

 damper locations where vegetation was most abundant. 

 Melanoplus monticola Scudder. 



Geyser crust, Old Faithful Geyser, Upper Geyser Basin, Yellowstone 

 Park, Aug. 7, 1 9 . Near Grand Canon, Yellowstone Park, Aug. 10, 

 2 d' , 3 ? . Yellowstone Lake, Aug. 7, 7 c? , 9 9 . Knob Hill, Colorado 

 Springs, Colorado, Aug. 22, 27 c?, 17 9 . Pike's Peak, Colorado, Aug. 

 20: Mountain View, 9,700 feet, 1 d", 1 9 ; Middle Hudsonian, 10,500 

 feet, 2 6"; along timber-line, 11,578 feet, 3 d^ ; below Windy Point, 

 12,000 feet, 13 cd, 12 9. 



This large series exhibits a considerable amount of variation in 

 color and size, the greater part of Avhich can be attributed to elevation. 

 The specimens from Pike's Peak are all smaller, those from over 11,000 

 feet particularly, and the colors are as a rule duller. Specimens from 

 Windy Point are as small as 15 (d^) and 16 ( 9 ) millimeters in the 

 length of the body, while those from Knob Hill are much larger and 

 range between 17.5 and 22 (d^) and 23 and 30 ( 9 ). One male and one 

 female from Yellowstone Lake as well the majority of the Pike's Peak 

 individuals are very dark in color, while some of the females from the 

 latter locality are strongly touched with green. The specimens from 

 the lower elevations are quite richly colored, and this with then- larger 

 size would seem to indicate another species, but no characters of the 

 appendages seem to warrant their separation. The Middle Hudsonian 

 individuals are perfectly intermediate between the Pike's Peak repre- 

 sentatives and the lowland specimens in size and the brilliancy of the 

 coloration. 



The species has previously been recorded only from Sierra Blanca, 

 Colorado, 12,000 to 13,000 feet, and from Windy Point, Pike's Peak. 



This species was found in exceedingly varied locations. Not only 

 was it abundant in the alpine herbage above the timber-line on Pike's 

 Peak, but it was also plentiful on the prairie outside of Colorado Springs. 

 In the Yellowstone Park the species was found in the decidedly boreal 

 portions. 

 Melanoplus canonicus Scudder. 



Salt Lake City, Utah, Aug. 13, 9 d", 4 9. Hillside at Salt Lake 

 City, Aug. 14, 2 9 . Top of Ensign Peak, Salt Lake City, Aug. 13, 

 2 9 . Grand Junction, Colorado, Aug. 15, 4 9 . 



