418 PROCEEDINGS OF THE ACADEMY OF [Sept., 



GRYLLID^. 

 NEMOBITJS Serville. 

 Nemobius fasciatus (DeGeer). 



Mammoth Hot Springs, Yellowstone Park, Aug. 5, 2 c^, 2 9. 

 Geyser crust, Old Faithful, Upper Geyser Basin, Yellowstone Park, 

 Aug. 7, 1 d^, 1 9. Five miles south of Salt Lake City, Utah, in 

 alfalfa field, Aug. 13, 1 d". St. Louis, Missouri, Aug. 27, 1 9 . 

 All specimens in this series are brachypterous. 



GRYLLUS Linnaeus. 

 Gryllus pennsylvanieus Burmeister. 



On geyser formation at the upper end of Mammoth Hot Springs, 

 Yellowstone Park, Aug. 5, 2 9 . Brush, Morgan Co., Colorado, Aug. 

 24, 1 9 . St. Louis, Missoiu-i, Aug. 27, 1 9 . 



The specimens are brachj'pterous. 



The specimens taken at the Hot Springs were lying dead on the 

 geyser formation, evidently killed by the fumes issuing from a nearby 

 vent hole. 



(ECANTHUS Serville. 

 (Ecanthus quadripunctatus Beutenmuller. 



Knob Hill, Colorado Springs, Aug. 18-22, 5 d^. Prairie land, 

 Colorado Springs, Aug. 18, 1 d^. Garden of the Gods, Colorado, Aug. 

 17, 1 d. 



The antennal maculations, particularly on the proximal joint, vary 

 considerably in shape, in one specimen approaching fasciatus and in 

 others approaching pini. 



A common species on the higher weeds and bushes growing on the 

 prairie. Their low but continuous stridulating would be heard often 

 many yards away. 



