PLECOPTERA OF NORTH AMERICA 269 



Capnia brevicauda Claassen. 



(Plate 47, fig. 2; plate 49, fig. 12.) 

 L924. Capnia brevicauda Claassen, Can. Ent., 56:55. 



Length to tip of wings, female, 6-6.5 mm. Expanse, fe- 

 male, 10-10.5 mm. 



General color dark brown. Head wider than prothorax ; 

 dark brown ; frontal ridge black ; large, black, flat, polished 

 lateral tubercles ; a large rounded black spot back of each 

 hind ocellus ; hind ocelli only about two diameters distant 

 from the eyes. Prothorax about as long as wide ; sides 

 nearly straight ; front angles broadly rounded, hind angles 

 quite sharp ; surface slightly rugose ; three narrow median 

 longitudinal black lines and a narrow black line completely 

 surrounding the inner disc. Legs dark brown. Wings 

 uniformly f umose ; crossvein beyond Sc about half way 

 between the cord and the tip of wing; R not sinuate at 

 origin of Rs. Cerci short, composed of four or five seg- 

 ments. 



Male, unknown. 



Female. Eighth sternite unmodified and not produced 

 into a subgenital plate. 



Holotype, female, Boulder, Colo. (G. S. Dodds, in Cor- 

 nell University Collection) ; paratypes, four females, from 

 the same locality. 



Okamoto has recently made a new genus (Eucapnopsis) 

 for the species with short cerci, however the venation and 

 other characters are typical of Capnia. 



Capnia crinita, new species. 



(Plate 33, fig. 6.) 



Length to tip of wings, female, 16 mm. Expanse, 28 

 mm. 



A large blackish hairy species. Head slightly wider than 

 prothorax, blackish ; hind ocelli closer to the eyes than to 

 each other; antennae blackish, covered with long hairs. 



Prothorax wider than long, slightly narrowed behind ; 

 front angles broadly rounded, hind angles narrowly 

 rounded; front and lateral margins brown, rest of pro- 

 notum blackish ; surface quite rugose and very hairy. 

 Legs blackish. Wings subhyaline ; veins rather heavy 

 brown; 5-6 costal crossveins before the end of subcosta 

 and 2-3 beyond ; in the hind wing the costal space is very 

 wide, much wider than in other species of this genus; 

 the wings on the left side of the specimen have several 

 crossveins between the branches of the radial sector — 

 three in the front wing and two in the hind wing; there 

 are no such crossveins in the wings on the right side. 



