PLECOPTERA OF XORTH AMERICA 24-7 



Type, No. 11304, male, Pullman, Wash. (Banks Coll., 

 Mus. Comp. Zool., Cambridge, Mass.) ; eight females, one 

 male, April, Wenatchee, Wash.; one male, March 31, Ft. 

 Collins, Colo.; four males, one female, March 30-April 4, 

 Boulder, Colo. ; April 3-7, 1897, Pullman, Wash. ; June 17, 

 1901, Banff, Alberta. 



Taeniopteryx californica, new species. 



(Plate 45, figs. 9, 10; plate 46, fig. 5.) 



Length to tip of wings, female, 11 mm. Expanse, fe- 

 male, 17.5 mm. 



General color brown to blackish. 



Head brown, a little wider than prothorax; occiput 

 rugose, the rugosities and lateral tubercles darker brown ; 

 a depressed area between the hind ocelli ; hind ocelli at 

 least three times as close to the eyes as to each other; 

 antennae brown, composed of about fifty segments. 



Prothorax brown, wider than long ; slightly widened be- 

 hind; angles almost square; surface quite rugose. Legs 

 brown. Wings hyaline. Subcosta reaches the cord in the 

 hind wing; three costal crossveins before the end of sub- 

 costa and one beyond. 



Abdomen brown. Cerci composed of six segments in 

 the male and five in the female. 



Male. Supra-anal process short, erect, bifurcate with 

 the points of the two processes directed backward and 

 with a small knob at base of the bifurcation ; subanal 

 lobes asymmetrical, largely membranous ; a large raised 

 granular knob or process at the base of each cercus ; tenth 

 abdominal tergite with two rearward pointing, rounded* 

 chitinous lobes; ninth abdominal sternite greatly pro- 

 longed into a subgenital plate which reaches beyond the 

 tip of segment ten ; the subgenital plate does not bear 

 a ventral lobe or appendage. 



Female. Genital opening not guarded by valves or 

 covered by a subgenital plate; ninth abdominal sternite 

 greatly prolonged into a broadly rounded subgenital plate 

 which reaches beyond the tips of the cerci. 



Holotype, male, allotype, female, Feb. 1892, Palo Alto, 

 Calif. (Cornell University Collection) ; paratype, one fe- 

 male, March, 1892, Palo Alto, Calif. 



