1906.] NATURAL SCIENCES OF PHILADELPHIA. 391 



Volcano and Upper Geyser Basin males are slightly smaller than 

 the Daileys specimens (24 mm.). The females appear to be rather 

 uniform in size. Three of the four females from Upper Geyser Basin 

 are suffused with rufescent, while the other female and three males 

 from the same locality are without any suffusion. The females from 

 Fountain have the colors more contrasted than the majority of the 

 Daileys females, while the Emerald Spring female has the contrast 

 just as great. The males from Fountain have the pale tints more 

 grayish and less ochraceous than in the Daileys males. 



The species was so abundant about Daileys that during the iDrief 

 stop of the train nineteen specimens were easily taken. This was also 

 the most abundant species of Orthoptera found about the geyser for- 

 mations of the Park. The insects are wary and rise on the wing with 

 speed. The coloration of the individuals almost invariably blended 

 exactly with the soil on which they were found. 

 Trimerotropis vinoulata Scudder. 



Electric, Park Co., Montana, Aug. 4, 1 c?. Muir, Bozeman Tunnel, 

 Montana, Aug. 12, 1 9 . Whitehall, Jefferson Co., ^lontana, Aug. 12, 

 1 c? , 3 9 . Upper Geyser Basin, Yellowstone Park, Aug. 7, 1 9 . 

 Salt Lake City, Utah, Aug. 14, 1 9 . Antlers, Garfield Co., Colorado, 

 Aug. 15, 1 d^. Debeque, Mesa Co., Colorado, Aug. 15, 1 d^. Austin 

 Bluffs, Colorado Springs, Colorado, Aug. 18, 2 9 . Manitou, Colorado, 

 6,700-7,000 feet, Aug. 23, 4 d", 4 9 . Garden of the Gods, Colorado, 

 Aug. 19, 2 9 . 



This series represents a great and interesting amount of variation 

 even for this plastic species, ^'ariation in size is considerable, the 

 largest males being from Electric, Debeque and Manitou, the smallest 

 from Antlers ; the largest female from Salt Lake City, the smallest from 

 Austin Bluffs. These differences in size appear to be individual, 

 as the smallest male (Antlers) is from the same general region as the 

 largest (Debeque). The specimens from Muir and Wliitehall, ]\Ion- 

 tana, are large, of rather uniform size, and but little smaller than the 

 large Salt Lake City individual. 



In coloration we find such variation that a detailed account may be 

 of interest. The Electric specimen has the bands solid and the lighter 

 colors hoary and sharply contrasted; the Muir and Whitehall repre- 

 sentatives are quite dull, the Muir specimen almost blackish, while the 

 bands are only moderately distinct, in one of the Whitehall individuals 

 broken up into annuli. The Muir and Whitehall type has the pro- 

 notum with little contrast, and the caudal femora less variegated than 

 in the Electric individual. The Yellowstone specimen is overcast with 



