Entomological Societij of British Columhia 21 



thippus oregonensis are merelj' ' jieo^n-aphic races' of the same species. 

 This never has been established in print but your series demonstrates it. 

 The area of intergradation is covered by your specimens and they fluc- 

 tuate between the two much as follows: Vernon specimens, nearer ore- 

 gonensis; Anahim Lake specimens, nearly typical curtipennis to distinctly 

 iiitcrmi'diate ; Chilcotin specimens, from typical curtipennis to typical 

 oregonensis — the majority being intermediate." 



This species frequents moist grass land and hay fields and is com- 

 mon throughout the Province wherever collecting has been done. 



Locality records. Sandon, Vernon, 1897 (E. M. Walker). Lloyd- 

 minster, Greenwood, 1906 (W. J. Alexander). Lillooet, 1918 (R. C. 

 Treherne). Osoyoos, Fairview, Okanagan Palls, Penticton, Westbank, 

 Summerland, Salmon Arm, 1919; Williams Lake, Chilcotin, Anahim 

 Lake, Harkerville, Quesnel. 1920-21 (E. R. Buckell). 



Platybothrus brunneus Thomas, 1871. 



Thomas, Cyrus. Rep. U. S. Geol. Surv., Wyoming, p. 280 (1871). 



This species was very common throughout the Chilcotin and adjoin- 

 ing districts during the years 1920 and 1921, and did considerable damage 

 to the grass on the cattle ranges. It was present in the form of a serious 

 outbreak over some 2000 square miles of dry range country from the 

 Chilcotin country south to the Nicola Valley. 



Locality records. Grand Prairie. Nicola Valley, Big Bar, Clinton, 

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



Subfamily III. OEDIPODINAE 

 • (The Band-winged Locusts) 



This subfamily includes those genera having the prosternum without 

 a tubercle or spine ; head with the vertex sloping downward, the face 

 nearly vertical, rounded where joined to the vertex. Foveolae present. 

 Eyes rather small, shorter than the portion of the genae below their orbit. 

 Antennae filiform or sublinear, and usually inserted above the middle of 

 the eyes, sometimes almost above the eyes themselves. Disk of the 

 pronotum with the rear margin much wider than the anterior margin. 

 Surface of the pronotum wrinkled or covered with tubercles. Lateral 

 carinae faint or wanting. Median carina often raised in a sharp crest, 

 and cut by one or two sulci (except in the genus Arphia). Tegmina and 

 wings always fully developed. Wings usually brightly colored, and with 

 a median black band. Most of the British Columbia Oedipodinae pro- 

 duce a snapping or rattling sound when in flight. 



British Columbia Oedipodinae 



Among the Oedipodinae collected during the past three years in 

 British Columbia there are some whose correct specific determination is 

 not possible at this time. In the genus Trimerotropis there are several 



