2.56 THOMAS SAY FOUNDATION 



bose, smooth ; raised process on seventh tergite 



deeply emarginate behind teresa 



Ninth abdominal tergite without tubercles; 

 supra-anal process not globose ; raised process 

 on seventh tergite not deeply emarginate 13 



13. Supra-anal process short, on the anterior margin 



with large bristles or spines ; process on sev- 

 enth tergite not much produced backward 



tumida 



Supra-anal process quite long, without spines or 

 bristles ; process on seventh tergite produced 

 backward considerably decepta 



14. Eighth abdominal tergite with a raised rounded 



knob closely beset with short tubercles 



nearctica 



Eighth abdominal tergite without a raised 

 rounded knob 15 



15. Ninth abdominal tergite with two rounded, hairy 



knobs, one each side of the median depressed 



area; eighth tergite largely membranous 



californica 



Ninth abdominal tergite smooth, without knobs ; 

 eighth tergite with the hind margin produced 

 and apically notched and bearing before the 

 apex a small tubercle excavata 



Capnia vernalis Newport. 



(Plate 47, fig. 6; plate 48, figs. 1, 2.) 

 1848. Capnia vernalis Newport, Proe. Linn. Soc, p. 388. 



1851. Capnia vernalis Newport, Trans. Linn. Soc, 20:451. 



1852. Capnia vernalis Walker, Cat., p. 176. 

 1852. Nemoura tenuis Walker, Cat., p. 182. 



1861. Capnia vernalis Hagen, Ins. Neur. N. A., p. 33. 

 1892. Capnia vernalis Banks, Cat., p. 342. 

 1907. Capnia vernalis Banks, Cat. Neurop., 15. 



Length to tip of wings, male, 4.5-5.5 mm. ; female, 5.5- 

 6.5 mm. Expanse, male, 7-9 mm. ; female, 8-11 mm. 



General color black. Head a little wider than prothorax, 

 black, shining; hind ocelli at least three times as close to 

 eyes as to each other. Antennae dark brown to blackish. 



Prothorax blackish, slightly rugose; wider than long; 

 front angles broadly, hind angles narrowly rounded ; sides 

 somewhat convex. Legs dark brown. Wings somewhat 

 inf uscated ; wings of male usually shorter than abdomen, 

 of female about as long or longer than abdomen ; Sc does 

 not reach to the cord; R very slightly sinuate at origin 

 of Rs ; Rs comes off of R at a rather narrow angle. Cerci 

 brown, quite hairy, composed of at least twenty-five 



