PLECOPTERA OF NORTH AMERICA 191 



blackish. Entire pronotum covered with fine gray pile. 

 Meso- and metathorax blackish brown. Legs dark brown. 

 Tarsi blackish. Wings subhyaline with dark brown veins. 



Abdomen dark brown, somewhat lighter toward the 

 tip and beneath. Tails brown. 



Male. Segment 9 with the usual transversely oval pol- 

 ished hammer on the prolonged ventral extension. Geni- 

 tal hooks slender, curving upward and inward and ending 

 in sharp incurved points. Prickles on the dorsal surface 

 of segments 9 and 10 very numerous. 



Female. Subgenital plate extends about half way across 

 the 9th sternite, is broadly oval in outline, with the medi- 

 an emargination making its apex bilobed. Lobes rounded. 



Distribution. — Type locality, Black Mountains, N. C. 



North Carolina, Black Mts., July 1-Aug. 30, 

 1912 (Beutenmiiller) ; Sunburst, Haywood Co., 

 late May (C. S. Brimley). 



Acroneuria depressa Needham and Claassen. 



(Plate 16, fig. 4; plate 28, figs. 15, 16; plate 30, fig. 6.) 

 1922. Acroneuria depressa Needham and Claassen, Can. Ent., 54:253- 

 254. 



Length to tip of wings, $ , 29-32 mm. ; 9 , 32-40 mm. Ex- 

 panse, $ , 48-50 mm.; 5, 56-70 mm. 



General color light brown. Head wider than prothorax, 

 reddish brown, darker on clypeus and somewhat darker 

 over the ocellar triangle. Ocelli large, with black on the 

 inside ; hind ocelli a little closer to each other than to the 

 eyes. Prothorax wider than long, not narrowed behind, 

 angles rather sharp, rugosities not very strong. Legs 

 yellowish; femora with a black transverse band just be- 

 fore the tip. Wings uniformly subhyaline ; veins light 

 brown ; usually no crossveins in the outer field beyond the 

 cord. Tails light brown thickly clothed with short hairs. 

 Male. Ninth ventral segment bears a large, transverse, 

 oval, smooth hammer; subanal lobes flattened, triangu- 

 lar, sharply pointed; segments 9 and 10 above each with 

 many short spines. 



Female. Eighth ventral segment unmodified. 

 Distribution — 



Washington, Yakima River, Lonetree, June 30, 



1882. 

 California, Strawberry Valley, Eldorado Co., 

 Aug. 5, Aug. 13 (E. C. Van Dyke) ; Woods 

 Creek, Fresno Co., July 22 (E. C. Van Dyke) ; 

 Terwak, Del Norte Co., Sept. 9, 1920 (Carl D. 

 Duncan). 



