1906.] NATURAL SCIENCES OF PHILADELPHIA. 409 



I found this species quite plentiful in a grassy field choked with many 

 bushes. In this locality the species far outnumbered any other 

 Orthopteron. At ]\Ianitou I found it on the hillside, where mountainous 

 plants and scrub oaks formed practically the only vegetation. 

 Melanoplus montanus (Thomas). 



Mammoth Hot Springs, Yellowstone Park, Aug. 5, 3 c^, 6 9 . 

 Norris Pass, Continental Divide, Yellowstone Park, Aug. 7, 2 9 . 



This rather conspicuous species has previously been recorded only 

 from Montana. The males in the series examined are quite uniform in 

 size, and fairly so in coloration. The females vary considerably in 

 size, one from Mammoth Hot Springs being distinctly smaller than the 

 others, which latter are slightly larger than the two females from Norris 

 Pass. The dark colors are more blackish and the browns more rufes- 

 cent in the Norris Pass individuals than in any others. 



A distinctly mountainous species which I found only on the higher 

 hillsides. The insects were powerful but too awkward to escape 

 captvu'e. 

 Melanoplus altitudinum (Scudder). 



Pike's Peak, Colorado, Dark Canon, 8,920 feet, Aug. 16, 16 d", 9 9 , 

 1 nymph; upper slope of Dark Canon, 9,000 feet, Aug. 16, 2 c?, 2 ? ; 

 below Windy Point, 12,000 feet, Aug. 20, 3 d", 2 9 . 



The Dark Canon specimens are quite uniform in size, but the three 

 Windy Point specimens are smaller than any of the former and the 

 males are smaller than any specimens of the species seen. The smallest 

 Dark Canon male measures 16.2 millimeters in length, while a Windy 

 Point specimen measures 14.5. There is considerable variation in the 

 intensity of color in the series examined, but the pattern does not 

 vary to any considerable degree. The proximal portions of the 

 antennae are more red than orange in all the Pike's Peak specimens. 

 The ventral sulcus of the caudal femora is dull yellowish in some 

 specimens and suffused with sanguineous in others. 



This species was extremely common in grassy Dark Canon, while 

 several specimens were also taken in the short grass above the tree-line. 

 The insects were active but easily captured. 



Melanoplus fasciatus (Walker). 



Pine woods. Old Faithful Geyser, Upper Geyser Basin, Yellowstone 

 Park, Aug. 7, 3 cJ, 6 9 . Knob Hill, Colorado Springs, Colorado, Aug. 

 17, 1 9 . Manitou, Colorado, 6,900 feet, Aug. 23, 3 d', 2 9 . Pike's 

 Peak, Colorado: Mountain View, 9,700 feet, Aug. 20, 1 d" ; Dark Canon, 

 8,920 feet, Aug. 16, 1 d" ; below Windy Point, 12,000 feet, Aug. 20, 1 9 



