378 PROCEEDINGS OF THE ACADEMY OF [Sept., 



City, Utah, Aug. 13 and 14, 2 ? . Grand Junction, Colorado, Aug. 

 15, 1 d", 1 ?. Colorado Springs, Colorado, Aug. 17, 3 d", 2 9. 

 Knob Hill, Colorado Springs, Aug. 17-22, 6 d", 1 9 . Fort Morgan, 

 Morgan Co., Colorado, Aug. 24, 1 9 . 

 Ever3^where common in dusty locations, 



Dissosteira longipennis (Thomas). 



Colorado Springs, Colorado, Aug. 17 and 18, 2 c?, 1 9 . Knob Hill, 

 Colorado Springs, Aug. 17 and 18, 4 d^, 1 9 . 



Specimens have also been examined from Denver, Pueblo, Fort 

 Morgan and La Junta, Colorado, and Sidne}^ Nebraska. 



A somewhat scarce species and one of the wariest insects collected . I 

 found the specimens on the prairie, and would sometimes be obliged 

 to follow one several hundred yards before an opportunity was offered 

 to capture it. The flight of this insect is swift and high and often of 

 considerable length. 



Dissosteira spuroata Saussure. 



Salt Lake City, Utah, Aug. 13 and 14, 13 c?, 5 9 . 



This series exhibits a great amount of variation in the intensity of 

 the color pattern, some individuals being very dull, almost uniform, 

 while others have a strikingly contrasted pattern. As previously 

 remarked by Saussure, this species bears a considerable superficial 

 resemblance to Spharagemon venustum. 



These specimens were all taken in a field of alfalfa stubble. 

 Although in this locality the species was abundant, specimens were 

 not taken with ease owing to their extreme wariness and their sudden 

 zigzag flight. Their coloration was of great protective value, as when 

 at rest it was almost impossible to distinguish them from the dried 

 alfalfa. 



SPHARAGEMON Scudder. 

 Spharagemon aequale (Say). 



Colorado Springs, Colorado, Aug. 17 and 18, 3 d^, 3 9 . Knob Hill, 

 Colorado Springs, Aug. 18, 1 d^, 1 9 . Prairie land, Colorado Springs, 

 Aug. 18, 1 d', 4 9 . Salt Lake City, Utah, Aug. 13, 2 d', 3 9 . Hill- 

 side at Salt Lake City, Aug. 14, 1 9 . 



One specimen onlj- is collared, a female from the prairie at Colorado 

 Springs. 



This species was moderately abundant on the grassy plain near 

 Colorado Springs and was easily captured, as it was by no means as 

 active as other species of the genus. 



