1906.] NATURAL SCIENCES OF PHILADELPHIA. 417 



produced by Orchelimum vulgare. When alarmed the insects fairly 

 tumble from their perch and hurriedly seek their holes at the plant's 

 roots. So quickly can these apparently clumsy insects reach their 

 holes that it is only possible to surprise them still in the bush by ap- 

 proaching with the greatest caution. The insects are exceedingly 

 poor at jumping and are completely helpless when removed from their 

 home bush. 



Anabrus coloradus Thomas. 



Manitou, Colorado, Aug. 2.3, 4 cJ^, 2 ?. Hillside at 6,700 feet, 

 Manitou, Aug. 16, 1 ?. Halfway House, Pike's Peak, Aug., 2 d^. 

 Mountain View, Pike's Peak, 9,700 feet, Aug. 20, 1 d". 



These specimens have also been examined and determined by Mr. 

 Caudell. 



These insects were all taken from low bushes growing in or near the 

 woods on the slopes of Pike's Peak. Their stridulations were quite 

 long. 



STEIROXYS Herman. 

 Steiroxys trilineata (Thomas). 



Muir, Bozeman Tunnel, Gallatin-Park Co., Montana, Aug. 12, 1 9 . 

 Mammoth Hot Springs, Yellowstone Park, Aug. 5, 3 9 . Summit of 

 foothill of Gallatin range. Mammoth Hot Springs, Yellowstone Park, 

 7,000 feet, Aug. 5, 2 9 . Near Grand Canon, Yellowstone Park, Aug. 

 10, 2 9 . Yellowstone Lake, Yellowstone Park, Aug. 7, 2 9 . 



Most of these specimens would by the rather uniform dorsal face of 

 their abdomen be referred to pallidipalpus, but the authors do not 

 consider the blackish V-shaped maculations of the abdomen constant 

 enough to use for the separation of the two ' 'forms." 



This species was somewhat plentiful under sage-brush. They 

 inhabited holes at the roots of these bushes, in which they sought 

 refuge upon the least sign of danger. They hopped along awkwardly, 

 but disappeared in their holes with surprising speed. 



EREMOPEDES Scudder. 

 Eremopedes balli Caudell. 



Austin Bluffs, Colorado Springs, Colorado, Aug. 18, 1 c?. Prairie 

 land, Colorado Springs, Aug. 18, 2 9 . 



This species was previously known only from Fort Colhns, Colorado, 

 and Williams and Flagstaff, Arizona. This species was found on the 

 ground among grasses. It is strictly terrestrial. 



