212 THOMAS SAY FOUNDATION 



Nemoura cinctipes Banks. 



(Plate 82, fig. 2; plate 37, figs. 5-8.) 

 1897. Nemoura cinctipes Banks, Trans. Am. Ent. Soc, 24:21. 

 1907. Nemoura cinctipes Banks, Can. Ent.. 39:329. 

 1907. Nemoura cinctipes Banks, Cat., p. 14. 



Length to tip of wings, male, 9.5-10 mm. ; female, 13 

 mm. Expanse, male, 15-16 mm. ; female, 22-24 mm. 



General color blackish brown, with banded legs and 

 wings. 



Head a little wider than prothorax ; hind ocelli closer to 

 eyes than to each other ; antennae brown. 



Prothorax dark brown, surface slightly rugose, wider 

 than long, narrowed behind, angles broadly rounded. Legs 

 dark brown, femora with a yellow band beyond the mid- 

 dle. Wings with three transverse dark bands, one at the 

 tip, another midway between the cord and tip and the 

 third extending more or less across the entire cord (some- 

 times the entire forewings quite heavily infuscated, espe- 

 cially along the veins), anal field of hind wings large. 

 Four groups of gills present. 



Male. Subanal lobes very broad, truncate, on inner 

 margin with a short spine-like process ; cerci large mem- 

 branous, with a narrow chitinized collar or basipodite; 

 supra-anal process recurved, much enlarged (side view), 

 largely membranous and spinulose on the outer halves; 

 subgenital plate moderately produced; ventral lobe about 

 three times as long as wide. 



Female. Seventh sternite produced over the entire 

 eighth segment as a broadly rounded subgenital plate; 

 eighth sternite unmodified. 



Distribution. — Type, female, No. 11363, Olympia, Wash, 

 (in Banks Collection, Mus. Comp. Zool., Cambridge, 

 Mass.). 



The Banks Collection also contains specimens as fol- 

 lows: two females, one male, Olympia, Wash.; two males, 

 two females, Wellington, B. C. ; two females, April 30, and 

 May 1, Bon Acord, B. C. ; one male, one female, March 27, 

 1902, Coldstream, B. C; one female, July 3, 1901, Port 

 Renfrew, B. C. 



We have specimens from the following localities: July 

 1-3, 1915, Maligne Lake, Alberta, Can. (E. L. Diven) ; 

 June 22, 1908, Banff, Alberta, Can. (J. C. Bradley) ; July 

 17, 1908, Selkirk Mts., B. C. (J. C. Bradley) ; July 12-18, 

 1908, Carbonate to Prairie Hills, B. C. (J. C. Bradley) ; 

 March, 1923, Terrace, B. C. (Mrs. W. W. Hippisley) ; 

 March 31-April 3, 1915, Nisqually Glacier, Mt. Rainier, 



