PLECOPTERA OE NORTH AMERICA 249 



Prothorax black with the lateral margins sometimes 

 a little yellowish ; wider than long ; widened behind ; sides 

 somewhat convex ; angles rounded ; surface somewhat 

 rugose. Legs dark brown, the femora darker above and 

 the tarsi blackish. Wings lightly inf uscated ; subcosta 

 reaches almost to the cord ; two or three costal crossveins 

 before the end of the subcosta and one beyond. 



Abdomen black, yellow at the tip. Cerci of male yellow, 

 with six segments. 



Male. Supra-anal lobe short, erect, directed backward 

 at the tip and there emarginate so as to form two rear- 

 ward pointing processes ; subanal lobes modified into asym- 

 metrical complex membranous processes; at the base of 

 each cercus a slender, bluntly pointed, tuberculate proc- 

 ess ; tenth abdominal tergite with two rearward pointing, 

 broadly truncate lobes, similar to T. pacifica ; ninth ab- 

 dominal sternite greatly prolonged into a subgenital plate 

 which surpasses far the tip of the abdomen ; subgenital 

 plate without a ventral appendage. 



Female, unknown. 



Holotype, male, and two male paratypes, Feb. 21, 1912, 

 Corvallis, Ore. (H. F. Wilson, Cornell University Collec- 

 tion) . 



Taeniopteryx banksii, new name. 



(Plate 46, fig. 10.) 

 1918. Taeniopteryx pallida Banks, Bull. Mus. Comp. Zool., 62, No. 1, 

 p. 9 (preoc). 



Length to tip of wings, female, 12 mm. Expanse, fe- 

 male, 20 mm. 



General color dark brown or slightly reddish. 



Head dark brown with a black spot over the ocellar 

 triangle, and with black longitudinal broken lines on the 

 occiput ; lateral tubercles flat, dark to blackish ; a de- 

 pressed area between the hind ocelli; hind ocelli about 

 three times as close to eyes as to each other; antennae 

 dark brown or blackish. 



Prothorax a little narrower than head ; wider than long ; 

 somewhat widened posteriorly ; sides convex ; angles 

 rounded ; blackish and usually with lighter margins ; sur- 

 face somewhat rugose. Legs reddish brown, tarsi darker. 

 Wings uniformly hyaline ; subcosta does not quite reach 

 the cord; two or three costal crossveins before the end 

 of subcosta and one beyond. 



Abdomen blackish with a yellow tip. Cerci yellowish 

 with about six segments. 



Male, unknown. 



