170 



Jewett: Plecoptera 



10 



Fig. 6:30, Male terminalia of Capnia in lateral view, a, columbiana; b, barberi; c, teresa; 

 d, californica; e, excavata; f, glabra; g, elongata; h, sp/no/osa; i, tumida (o-g, ;', Needham and 

 Claassen, 1925; h, Claassen, 1937o). 



Park teresa Claassen 1924 



- Seventh tergite without a tubercle (fig. 6:3(W); Santa 

 Clara and Sonoma counties, California 



californica Claassen 1924 



8. Eighth tergite with a median elevation which is notched 

 at the tip in side view; no knob on the 7th tergite; 

 supra-anal process lacking long bristles (fig. 6:30e); 

 British Columbia to California 



excavata Claassen 1924 



- Eighth tergite largely membranous; 7th tergite with a 

 knob; supra-anal process fringed dorsally with long 

 forward-pointing bristles (fig. 6:30i); British Columbia 

 to California iumida Claassen 1924 



9. A conspicuous hump or process present on the 7th 

 tergite; supra-anal process reaching to the 7th tergite, 

 concave upward (fig. 6:30^); British Columbia to 



California elongata Claassen 1924 



No hump on the 7th tergite 10 



A rather low hump or process present on the 8th tergite; 

 supra-anal process reaching to the tubercle of the 8th 

 tergite (fig. 6:31&); Washington to California 



promota Frison 1937 



— No hump on the 8th tergite 11 



11. Supra-anal process blunt or merely pointed at the tip; 



9th tergite with longitudinal raised tubercles on either 

 side of a median membranous area (fig. 6:30/); Oregon 

 and California glabra Claassen 1924 



— Supra-anal process with a definite acute spine at the 

 tip, marked off from the process in dorsal and side 

 views (fig. 6:31a); British Columbia to California . . . 



projecta Prison 1937 



Subfamily TAENIOPTERYGINA E 



This is another group of Nemourids with a Holarctic 

 distribution. The North American representatives are 

 placed in the genera Brachyptera Newport (1851) and 



Taeniopteryx Pictet (1841). The key on page 159 will 

 readily separate the two genera, and the key below 

 will separate the North American subgenera and the 

 males of the California species of Brachyptera. 

 Females and nymphs of western species in this genus 

 are too little known at present to be keyed. Taeni- 

 opteryx maura (Pictet) 1842 (synonym: T. nivalis 

 Fitch 1847) (fig. 6:32) is a widespread North American 

 species which occurs in California. 



Key to North Americon Subgenera and 



California Species of Brachyptera 



Males 



1. Subgenital plate of the male sharply recurved upwards; 



OORSAL VIEW Of SUPRA. ANAL 



Fig. 6:31. Male terminalia of Capnia in lateral view, 

 a, projecta; b, promota (Frison, 1937). 



Adapted in 

 Ricker (1943). 



part from Needham and Claassen (1925) and 



