358 PROCEEDINGS OF THE ACADEMY OF [Sept. 



A CONTRIBUTION TO THE KNOWLEDGE OF THE ORTHOPTERA OF MONTANA, 

 YELLOWSTONE PARK, UTAH AND COLORADO. 



BY JAMES A. G. REHN AND MORGAN HEBARD. 



During the month of August, 1904, the junior, author was occupied 

 in collecting Orthoptera at a number of localities extending from 

 eastern Montana to Salt Lake City, and from that locality to east- 

 central Colorado. Collecting at some localities was limited to a few 

 minutes search permitted by the stoppage of the train, at other locali- 

 ties several days were spent and very extensive and interesting collec- 

 tions made. The careful study of the Orthoptera of the Yellowstone 

 Park and of Pike's Peak yielded some interesting and scarce species, 

 as well as two new forms and a considerable amount of information on 

 the habitat and actions of a number of species. 



The number of specimens in the collection studied is about 2,800, 

 and 121 species are represented. Notes on the habits and other infor- 

 mation has been given under most of the species by the collector, 

 and the chief localities visited have been briefly described, to aid in 

 a proper understanding of their conditions and environmental features 

 as well as to aid future students in this region. 



A considerable representation of the species treated in this paper 

 has been placed in the Academy's collection by the junior author. 



Montana. 



Waco, Yellowstone Co., elevation 2,700 feet. On the sage-brush 

 plains just east of the foothills of the Rockies. 



Grey Cliff, Sweetgrass Co., elevation 3,900 feet. In a more rugged 

 character of country than Waco but with a similar vegetation. 

 Orthoptera appeared to swarm as the specimens collected were taken 

 in less than two minutes. 



Billings, Yelloivstone Co., elevation 3,115 fe^t. Specimens taken 

 here were from the dusty main street of the town. 



Livingston, Park Co., elevation 4,488 feet. Material from this 

 locality was taken among weeds growing in a vacant lot near the 

 station. 



Emigrant, Daileys, Sphinx and Electric, Park Co., elevation 4,800- 



