328 



THE CANADIAN ENTOMOLOGIST. 



Acroneuria Qi(ebece?isis, Provancher. — A pair from Laggan, Alberta, 

 22nd July. 



The female has a notched ventral plate like a specimen in the Hagen 

 coll. at the M. C. Z., labelled A. Quebecensis. It is a narrower and darker 

 species than A. pacifica. 



Acroneuria pacifica^ Banks. — Nicolum River, Hope, B. C, 13th 

 July (Harvey) ; Vancouver (Har^'ey). 



Perla sabulosa. Banks. — Port Renfrew, B. C, 3rd July. 



Perla ebria, Hagen. — Vancouver (Harvey) ; Glacier, B. C., 22nd 

 August; Wellington, B. C, 9th August (Taylor); Laggan, Alta., 22nd 

 July; Banff Sp., Alta., 1 6th August (Currie). 



Paraperla frojitalis, Banks. — Laggan, 23rd August. 



Isoperla decolorata. Walker. — Described from Great Bear Lake. I 

 liave not seen it from British Columbia, but it occurs in Alaska and in 

 Eastern Canada. • 



Peltoperla brevis, n. sp. — Head pale, with a large, ill-defined black 

 cloud on the middle, not extending to the mouth ; antennae brown ; 

 pronotum brown, its margin paler; thorax dark brown or black; abdomen 

 brown ; legs pale yellowish ; wings subhyaline, venation brown, costal 

 veins yellowish. Structure similar to P. arcuata. Head broad, bent 

 dovrnward, two ocelli, about as close to each other as to eyes; antennae 

 slender, about as long as front legs, the joints rather nodiform ; pronotum 

 very broad, slightly angulate behind on the middle, its sides straight, 

 surface quite strongly rugose ; abdomen broad and short, setse very short, 

 scarcely one-half as long as width of abdomen ; 

 anal j^late of female (Fig. 17) large, notched at 

 middle behind. Wings rather short and broad, 

 many central cross-veins, radial sector forked 

 once beyond anastomosis; anal cell with two 

 widely-separated branches behind. 



Expanse, 18-20 rnm. 



I'rom Glacier, 21st August, and Port Ren- 

 frew, .3rd July. 



Alloperla Co/oradensis, Banks. — Port 

 Renfrew, 2nd July; Glacier, B. C, 20th July 

 and 2ist August; Laggan, Alta., 23rd August ; 

 Kaslo, B. C., i8th June (Currie) ; Ainsworth, 

 B. C, nth July (Currie) ; Kokanee Mt., B. C., 



,1 A z." o r. //^ • \ Fig. 17. — Ventral platt- of fe- 



lOth August, 8,000 ft. (Currie). male, PeitoperU brevis. 



