366 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Springs, Aug. 18-22, 1 6^, 2 9. Austin Bluffs, Colorado Springs, 

 Aug. 18, 8 c?, 6 9 . Prairie land, Colorado Springs, Aug. 18, 1 d^. 



This was an extremely scarce species on the grassy prairie, but among 

 the low plants growing in a forest of dwarf pines on Austin Bluffs it 

 was quite common. The insects spring about rapidly and are also able 

 to fly well. 

 Cordillacris cinerea (Bruner). 



Sphinx, Park Co., Montana, Aug. 4, 1 d^. Austin Bluffs, Colorado 

 Springs, Colorado, Aug. 18, 2 9 . 



This form appears to be hardly separable from the preceding. 



The male captured was taken in the sage-brush. So rapidly did 

 it jump about that several minutes were occupied in making the cap- 

 ture, as I had no net at the time. 

 Cordillacris crenulata (Bruner). 



Antlers, Garfield Co., Colorado, Aug. 15, 2 9 . Colorado Springs, 

 Colorado, Aug. 18, 1 9 . Knob Hill, Colorado Springs, Aug. 17-22, 

 8 (J^, 10 9 . Austin Bluffs, Colorado Springs, Aug. 18, 1 9 . Garden 

 of the Gods, Aug. 17 and 19, 1 d', 3 9 . 



This species was quite plentiful in the grass of the prairie outside 

 Colorado Springs. It was also taken among cactus and sage, in a 

 damp grassy meadow and among the low scattered plants growing in 

 a forest of dwarf pines. 



PHLIBOSTROMA Scudder. 

 Phlibostroma quadrimaculatum (Thomas). 



Colorado Springs, Colorado, Aug. 18, 2 d^, 2 9 . Knob Hill, Colo- 

 rado Springs, Aug. 17-22, 56-6^, 39 9 . Manitou, Colorado, Aug. 23, 

 1 9 . Garden of the Gods, Colorado, Aug. 17-23, 8 d", 5 9 . Akron, 

 Washington Co., Colorado, Aug. 24, 1 c^, 1 9 . 



One of the extremely plentiful species found in the prairie. Hun- 

 dreds could have been taken in a short time. ■ Quite a diversity of 

 coloration occurred in the specimens, for among those taken were both 

 brown and green-marked individuals. The females were generally 

 of the green form, while the males were more of the wholly brown type. 



OEPHULELLA Giglio-Tos. 

 Orphulella pelidna (Burmeister). 



Knob Hill, Colorado Springs, Aug. 17-22, 5 d^, 5 9. . 



The separation of 0. pratorum from this form is a task apparently 

 hopeless. For the present at least we prefer to call these pelidna, as 

 pratorum as understood by us, on the basis of material from the south- 



