PLECOPTERA OF NORTH AMERICA 193 



ocelli much closer to each other than to the eyes; inside 

 of the ocelli a narrow dark ring of black pigment. An- 

 tennae with the first segment dark brown, lighter beyond ; 

 palpi dark brown. 



Prothorax narrower than head, slightly widened be- 

 hind; wider than long; sides straight; angles rather 

 sharp; median line yellowish, obscure; disc brown, some- 

 what lighter laterally, strongly rugose. Meso- and meta- 

 thorax brown with yellow at the front and at the base of 

 the wings. Legs brown, femora with a dark band just 

 before the distal end ; tibiae darker at the base ; tarsi fus- 

 cous. Wings uniformly subhyaline, veins brown; cross- 

 veins lacking in the outer submarginal area. 



Abdomen light yellowish at base, darker beyond. Tails 

 yellowish brown; basal segments very short; rather 

 sparsely covered with hairs. 



Male. Abdomen segment 9 abbreviated and thickened, 

 concave, and scurfy pubescent on its slightly upturned 

 apical margin, prolonged on the ventral side into a rather 

 narrow and strongly upturned subgenital scoop, whose 

 postero-ventral face bears an elongate, subrectangular 

 hammer, whose surface is polished and whose proximal 

 end is confluent with forward part of the segment by a 

 widening area, that is set off at the sides by two deep 

 folds. Genital hooks long, subcylindric, erect, tapering 

 into sharp points that turn forward and inward at ex- 

 treme apex. 



Female. Subgenital plate wanting, the 8th sternite 

 slightly concave on its apical border; two oval blackish 

 spots are upon the sides of the 9th sternite. 

 Distribution. — Type locality, Claremont, Cal. 



California, Paradise Val., Kings River, Fres- 

 no Co., July 15, 1910, alt. 7,000 ft. (E. C. Van 

 Dyke) ; Oakland, May 15, 1910 (E. C. Van 

 Dyke) ; Bear Val., Marin Co., May 25, 1919 ; 

 Lagunitas, Marin Co., June 14, 1908 (E. C. 

 Van Dyke) ; Three Rivers, 600-800 ft., July 

 12-14, 1907; Saquel Creek, Santa Cruz Co., 

 May 30, 1909 (E. C. Van Dyke) ; Sonoma Co., 

 June 19, 1910 (J. E. Kuschel) ; Lander, July, 

 1899 ; Felton, Santa Cruz Mts., May 29 (J. C. 

 Bradley) ; Redwood, Corralitos, Santa Cruz 

 Mts., May 13, 1907 (J. C. Bradley) ; Fallen 

 Leaf Lake, July 12; Fairfax, Marin Co., June 

 14 (E. C. Van Dyke) ; San Jose, Oct. 13, 1881 

 (Mrs. A. E. Bush) ; Dunsmuir (Wickam) ; 



