PLECOPTERA OF NORTH AMERICA 117 



in Canadian Entomological Collection, Ottawa, Canada). 

 Paratypes 6 males and 14 females, July 6-14, 1923, Wa- 

 terton Lakes, Alberta, Canada (J. McDunnough). 



Alloperla continua Banks. 



(Plate 21, figs. 11, 12.) 

 1911. Alloperla continua Banks, Trans. Am. Ent. Soc, 37:336. 



Length to tip of wings, male, 9.5-10.5 mm. ; expanse, 

 male, 16-18 mm., length to tip of wings, female, 11-12 

 mm. ; expanse, female, 19-21 mm. 



General color yellowish with a darker median stripe ex- 

 tending over head, prothorax and abdomen. 



Head very little wider than prothorax, yellowish with a 

 brown area over the ocellar triangle and over the clypeus ; 

 hind ocelli about as close to the eyes as to each other ; an- 

 tennae yellowish at base, darker towards the tip. 



Prothorax transversely oval, wider than long ; yellowish 

 with a broad dark median stripe whose margins are not 

 very clearly defined ; disc of pronotum slightly rugose. 

 Legs yellowish, tarsi darker. Wings greenish hyaline, 

 veins greenish yellow. 



Abdomen yellowish with a broad median dorsal dark 

 stripe. Cerci yellowish, somewhat darker toward the tip. 



Male. Anterior margin of ninth abdominal tergite with 

 a raised transverse recurved tubercle ; supra-anal process 

 slightly emarginate behind ; tenth tergite broadly cleft, 

 ninth with a median depression in which the supra-anal 

 process normally lies; subanal lobes small, unmodified; 

 ninth sternite somewhat produced and truncate behind. 



Female. Hind margin of eighth abdominal sternite 

 produced into a broadly triangular subgenital plate which 

 normally extends more than half way across the ninth 

 tergite and is evenly rounded behind. 



Distribution. — Type, female, No. 11349, June 17, San 

 Gabriel Mts., Calif.; cotypes, one female, June 15, San 

 Gabriel Mts., Calif. ; one male, mountains near Claremont, 

 Calif. (Banks Coll., Mus. Comp. Zool., Cambridge, 

 Mass.) ; one male, June 11, 1923, San Antonio Canyon, 

 near Claremont, Calif. (Theresa Robinson) ; two males, 

 three females, June 6-12, Keen Camp, Riverside Co., Calif. 

 (E. P. Van Duzee). 



The specimens from Keen Camp, Riverside Co., Calif., 

 are darker in color but structurally they agree with the 

 description. 



