26 Proceedings, 1922 



nor fully typical in the Snake River country of Idaho. It is also in a 

 stage of what might be called equal fusion with A. c. strepitus in regions 

 as related to the Snake River country as the Salt Lake Valley district, 

 and to the Great Basin region as the Columbia Plains (Yakima River) 

 and the dry interior of British Columbia (Chilcotin)." 



During the summers of 1920 and 1921 this species was found to be 

 very common in certain areas in the Chilcotin range country, frequenting 

 particularly the high, gravelly, dry ridges on the open cattle ranges at 

 an elevation of from 3000 tn 4500 feet. Tlie prolonged, harsh buzzing 

 sound made by this species in flight make it easy to detect. The sound 

 which it makes as it leaves the ground at one's feet is extremely similar 

 to the buzzing produced by the rattle-snakes which frequent the warmer 

 parts of southern British Columbia. 



Locality records. Vancouver Is., 1906 (S. H. Scudder). Big Bar, 

 Alkali Lake, Williams Lake, Chilcotin, 1920-21 (E. R. Buckell). 



Circotettix rabula Rehn and Hebard, 1906. 



Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., p. 393. (1906). 



This species has been recorded from Glenora, British Columbia, by 

 Rehn. Glenora is on the Stikine River a little south of Telegraph Creek 

 on latitude -58 N. in the Cassiar District. 



Locality records. Glenora (Rehn). 



Circotettix undulatus Thomas, 1871. 



Thomas. Cyrus. Rep. U. S. Geol. Surv. Montana, p. 460. (1871). 



This a common species in the Interior Dry Belt of British Columbia 

 frequenting roek-slides, cliffs, and rocky ravines. As this species is now 

 considered to be synonymous with Circotettix lobatus Saussure, the local- 

 ity records of both are included below. 



Locality records. Victoria, 1888 (J. Fletcher). Vernon, 1897 (E. 

 M. Walker). Walhachin, Savona, 1918; Fairview, 1919; Ashcroft, 

 Clinton, Big Bar, Williams Lake, Chilcotin, 1920-21 (E. R. Buckell). 



Circotettix suffusus Scudder, 1876. The Black Locust. 



Scudder, Samuel H. Bull. U.S. Geol. Surv. Territ. 11, p. 265 (1876). 



This is one of the most evenly distributed species in British Columbia, 

 being found everywhere that light open woodlands occur. It is partic- 

 ularly fond of roads through the forests, and a number of these insects 

 may often be seen sunning themselves on the roads during the heat of 

 the day. The males will frequently leave the ground and circling about 

 in the air they will often go for considerable flights through the woods, 

 returning again to the same spot in the road. During this flight they 

 will rise to a considerable height in the air and circling to and fro will 

 make, continuously throughout their flight, the loud snapping notes so 

 characteristic of this species and of its near relative Circotettix verrucu- 

 latus Kirby. 



