THE CANADIAN ENTOMOLOGIST. 



327 



12. An oblique cross-vein beyond end of die subcosta ; wings not 



involute Nemotira. 



No oblique cross-vein beyond end of subcosta 13. 



13. Wings involute ; pronotum as broad as long Leucira. 



Wings not involute ; pronotum longer than broad Perlomyia. 



14. The space beyond di^cal cell longer than discal cell Arsapnia. 



The space beyond discal cell shorter than the discal cell .... Capnia. 



List of Species. 

 Pteronarcys Californica, Newport. — A female from Vancouver 

 (Harvey). 



Pteronarcys pri?iceps, n. sp. — Head dark brown or black above, pale 

 around ocelli ; antennae blackish-brown ; pronotum black ; a reddish- 

 yellow spot in middle of front and hind margin, not distinctly connected ; 

 rest of thorax blackish ; abdomen paler brown, blackish on pleura, base of 

 venter paler. Legs dull blackish-brown ; wings rather smoky to quite 

 dark, the apical third from just before the pterostigma outward is more 

 infuscated, and there is a more distinct black cloud below the pterostigma; 

 venation blackish-brown ; in the male the basal part of the abdomen is 

 rather orange. The head is much narrowed in front; the pronotum has 

 all the angles acute, and the sides are slighily rugose ; the male tip of 

 abdomen is much like PL Caltfornica, but the scar each side is larger, 

 and the area that separates them is narrower at tip than in that species. 

 The ventral plate of the female (Fig. 16) has two very large hairy proc- 

 esses fully three times as long as in Pt. 

 Californica. 



Expanse, 70-75 mm. 

 One pair from Mission, B. C., April 

 (Harvey). 



Perlodes signata, Hagen. — Vancouver, 

 12th April (Harvey). 



Perlodes irregularis, Banks. — Glacier, 

 B. C, 2tsi August, and Laggan, Alta., 

 22nd July and 23rd August ; Kaslo, B. 

 Fig. 16. — Ventral plate of female of C., June (Currie, Dyar, Caudell) ; Ains- 



Pteronarcvs princeps. i t i //-. 



worth, I ith July (Curne). 

 Isogenics frontalis, Newman. — Vancouver, 19th May (Harvey); 

 Kokanee Mt., B. C, loih August, 9,000 ft., on snow (Currie). 



