PLECOPTERA OF XORTH AMERICA 229 



Holotype, male, Nov. 15, 1899, Tamalpais, Calif. (L. O. 

 Howard, in the U. S. National Museum). 



Leuctra grandis Banks. 



(Plate 40, figs. 11, 12; plate 42, fig. 7.) 



1906. Leuctra grandis Banks, Can. Ent., 338. 



1907. Leuctra grandis Banks, Cat., 15. 



1908. Leuctra grandis Banks, Proc. Ent. Soc. Wash., 9:151. 



Length to tip of wings, male, 9 mm. ; female, 11.5 mm. 

 Expanse, male, 17 mm. ; female, 22 mm. 



General color reddish brown. Head wider than pro- 

 thorax; surface nearly smooth; occiput slightly rugose; 

 hind ocelli about two and one-half diameters distant from 

 eyes. Prothorax brown, somewhat widened behind ; little 

 wider than long; median longitudinal field at least one- 

 fifth the width of pronotum; disc of pronotum slightly 

 rugose. Legs brown. Wings reddish f umose ; 4-5 Cu 

 crossveins beyond the last M-Cu crossveins. 



Male. Eighth tergite with a broad median chitinized 

 plate which is apically raised and triangularly bifurcate; 

 supra-anal lobe broadly triangular; subanal lobes long, 

 slender; titillators considerably shorter than subanal 

 lobes; cerci membranous, slender, about three times as 

 long as wide; ventral lobe about twice as long as wide, 

 very hairy- 

 Female. Subgenital plate produced over about half 

 of the ninth sternite, with a deep round median notch ; the 

 outer lobes of the subgenital plate dark. 



Type, female, 11369, Black Mts., N. C, June (Banks 

 Collection, Museum of Comparative Zoology, Cambridge, 

 Mass.) ; May to June, Black Mts., N. C. 



Leuctra hamula Claassen. 



(Plate 40, figs. 1, 2; plate 42, fig. 2.) 

 1923. Leuctra hamula Claassen, Can. Ent., 55:261. 



Length to tip of wings, male, 7.5 mm. ; female, 9 mm. 

 Expanse, male, 14 mm. ; female, 15 mm. 



General color brown to dark brown. Head wider than 

 prothorax, dark brown or blackish ; hind ocelli about two 

 diameters distant from the eyes. Prothorax dark brown, 

 wider than long, narrowed behind; front angles rounded, 

 hind angles sharp; median longitudinal field about one- 

 fourth the width of pronotum ; disc of pronotum quite 

 rugose. Legs dark brown, wings lightly f umose. 



Male. Seventh abdominal tergite bearing a moderate 

 short, raised, spatulate process which does not extend to 



