16 Proceedings, 1922 



mina and wings, when in repose, rest partly horizontal on the back of the 

 abdomen, and partly deflexed against the sides. The antennae are com- 

 posed of from six to twenty-four joints; shorter than the body, rarely 

 exceeding half its length ; they may be filiform, clubbed or ensiform in 

 shape. Auditory organs situated on the sides of the first abdominal 

 segment. Ocelli present. Ovipositor consisting of four short, horny 

 pieces, the so-called valves, projecting from the tip of the abdomen, two 

 of which curve upward and two downward. 



There are four subfamilies of Acrididae represented in British Col- 

 umbia. 



Subfamilies 



1. ACRYDIINAE (The Pigmy or Grouse Locusts). 



2. TRYXALINAE (The Oblique-faced Locusts). 



3. OEDIPODINAE (The Band-winged Locusts). 



4. ACRIDINAE (The Spine-breasted Locusts). 



Subfamily I. ACKYDIINAE 

 (Pigmy or Grouse Locusts) 



The species of tliis subfamily are all of small size and are often 

 mistaken for the young of other locusts. They may readily be separated 

 from the other three subfamilies by the following characters ; size small ; 

 pronotum extending back over the abdomen; no arolium or pad between 

 the claws of the tarsi ; tegmina rudimentary ; wings usually present and 

 well developed. 



They pass the winter with us as nymphs and adults in hibernation. 



The following species have been recorded from British Columbia. 



Acrydium granulatum Kirby, 1837. The Granulated Grouse Locust. 



Kii-by, William. Fauna Boreali-Americana. Insects, p. 251 (1837). 



This species is the commonest of our Grouse Locusts. It is found 

 most frequently in rough swampy meadows. Both macropterous (Acry- 

 dium granulatum granulatum) and brachypterous (Acrydium granu- 

 latum variegatum) forms are found but the macropterous form greatly 

 predominates. 



Locality records. Vancouver, (S. H. Scudder). Victoria, 1888 



(Rev. G. W. Taylor). Victoria, 1920 (W. Downes). Agassiz, 1897 

 (E. M. Walker). Field, 1906 (J. A. G. Rehn). Mission, 1919 (R. C. 

 Treherne). Fairview, Penticton, Vernon, Salmon Arm, Celesta, Chil- 

 cotin, 1920-21 (B. R. Buckell). Notch Hill, 1921 (C. R. Barlow). 



Acrydium brunneri Bolivar, 1887. Brunner's Grouse Locust. 



Bolivar, Ignatio. Ann. Soc. Belg., XXXI, p. 266 (1887). Bruxelles. 



This Grouse Locust was seen frequently among dead leaves under 

 willow bushes, in spruce swamps, and along streams in the Chilcotin 

 district during the summers of 1920 and 1921. Both short and long- 

 winged forms were secured. The bracliypterous form was found to be 



