2()<) THOMAS SAY FOUNDATION 



as long as wide; sides a little convex; front angles nar- 

 rowly rounded, hind angles quite sharp; surface very 

 lightly rugose. Legs black. Wings subfumose, the veins 

 heavy ; R of f orewing sinuate at the origin of Rs ; Rs 

 bending down almost at right angles; stem of Rs-M in 

 hind wing short. Abdomen dark brown; cerci blackish, 

 with at least nineteen segments. 



Male. Posterior half of the seventh abdominal tergite 

 raised into a narrow, rounded, hairy, transverse ridge ; 

 eighth, ninth and tenth tergites with a shallow median 

 depression, supra-anal process composed of two recurved 

 processes, one above the other, equally long, both heavily 

 chitinizecl, enlarged toward the tip and there bifid ; 

 subanal lobes broadly triangular, upcurved ; ninth sternite 

 slightly produced and evenly rounded behind. 



Female. Eighth abdominal sternite slightly produced ; 

 the hind margin with four triangular tooth-like processes 

 in some of the females, while in others the margin is 

 nearly straight. 



Holotype, male, allotype, female, March, 1923, Terrace, 

 B. C. (Mrs. W. W. Hippisley, in Cornell University Col- 

 lection) ; paratypes, six females. 



Capnia manitoba Claassen. 



(Plate 47, fig. 4; plate 49, figs. 8, 9.) 

 1924. Capnia manitoba Claassen, Can. Ent., 56:54. 



Length to tip of wings, male, 5-5.5 mm. ; female, 7.5-8.5 

 mm. Expanse, male, 8.5-9 mm. ; female, 13-14 mm. 



General color very dark brown to blackish. Head black, 

 wider than prothorax; covered with fine pile; lateral tu- 

 bercles large, flat, shiny ; hind ocelli closer to eyes than to 

 each other; antennae blackish, composed of about thirty- 

 five to thirty-eight segments. Prothorax black, wider than 

 long, the sides convex ; angles rounded ; surface rather 

 rugose. Legs dark brown, the femora darker above. Wings 

 f umose, veins dark brown ; venation as in plate 47, figure 

 4. Abdomen blackish. Cerci dark brown, with about 

 eighteen to twenty segments. 



Male. Seventh abdominal tergite with a V-shaped in- 

 cision on the anterior margin and on the posterior half 

 with a large, raised, rounded, finely granulate knob which 

 is slightly emarginate behind ; supra-anal process recurved 

 over the tergum, the upper part greatly arched, rod-like, 

 gradually tapering to a point and reaching to the knob on 

 the seventh tergite (natural position). The lower part 

 of the supra-anal process is more slender and lies closely 



