1920 ENTOMOLOGICAL SOCIETY. 55 



ACRIDINAE. 



In this sub-family nine species were collected belonging to eight genera. 



Pseudopomala 'bracliyptera (Scudder). Two immature insects of this species 

 were taken at Vaseaux Lake, between Penticton and Fairview, on June 14th. No 

 mature specimens were taken this summer. 



Ahentetus unicolor (McNeill). On June 27th, at Fairview, adults of this 

 species were first seen, and at this date considerable numbers were present on the 

 dry bunch-grass ranges. The nymphs had been observed since the middle of May. 

 By the end of July all were adult and they were found scat'tered about all over 

 the dry ranges south of Fairview, to the U.S. Boundary Line. A few adults could 

 still be found at the end of August. No observations were obtained as to their 

 breeding habits. These grasshoppers are very active and can jump long distances. 



Orphulella pelidna (Burin). These grasshoppers were first taken near Fair- 

 view on August 7th (1919) and were found during August fairly commonly near 

 the edges of ponds, and along the banks of the Okanagan River. They were only 

 seen where the grass was still green and were never observed out on the dry ranges. 

 They vary very much in colour, from a dark brown to a bright apple green. They 

 are strong jumpers but do not use their wings muck. This is the first time that 

 this insect has been recorded from British Columbia. 



Chloealtis ahdommalis (Thomas). This species was found in bushy pasture 

 land among dry grass tufts and in burnt-off bush land at Salmon Arm on September 

 29th. The males were heard stridulating and by approaching them carefully a 

 few were secured. 



Only one female was found; it was brachypterous and considerably larger than 

 the males, it was very sluggish and made no attempt to escape but its coloration 

 made it very hard to see among the grass tufts. When the males were at last spotted 

 after a careful stalk they were by no means easy to capture, as they would take 

 one or two big jumps and then burrow down among the leaves and rubbish on the 

 ground, their colour harmonizing closely with their surroundings. When stridu- 

 lating the males usually crawled up on to a log or stone. These grasshoppers were 

 found again at Vernon on October 4th, on light bush land. The males were 

 stridulating and one or two were secured but I could not find any females. The 

 eggs of this species are laid in rotten logs, fence-posts, etc. 



Chloealtis conspersa Harris. One male of this species was taken on September 

 29th at Salmon Arm while collecting Chloealtis ohdominaUs. These two species 

 are very similar, but C. conspersa can be distinguished by having the entire sides 

 of the pronotum and first few segments of the abdomen black, and the lower surface 

 of the last few abdominal segments orange-red. 



Stirapleura decussata (Scudder). This species was first observed at Penticton 

 on April 26th on a sheltered stony tract of land from which the snow had gone off 

 early. They were present in considerable numbers but were not very active at 

 this date, not having been out of hibernation very long. A few of them were still 

 in the nymph stage but by far the greater number were adult. As the spring had 

 only opened a short while before and snow was still present on the higher hills, 

 it would have been quite impossible for these to have hatched from eggs this spring 

 and to have grown to adult in this short time. They must, therefore, have hiber- 

 nated as adults and large nymphs. On May 4th this species was found commonly 

 scattered over the dry range country in the neighborhood of Fairview in the Lower 

 Okanagan Valley. Tliey were most plentiful on stony ground and sage-brush land. 



