PLECOPTERA OF NORTH AMERICA 113 



apo, N. Y. ; one female, June 11, 1915, Mix Creek Valley, 

 Cattaraugus Co., N. Y.; one male, two females, June 26, 

 Mt. Tom, Mass. (C. W. Johnson) ; one female, July 20, 

 Bar Harbor, Me. (C. W. Johnson) ; one female, July 11, 

 1908, Mt. Ascutney, Vt. (C. W. J.) ; one male, July 17, 1875 

 Mt. Washington, N. H. (Geo. Dimmock) ; one female, July 

 28, 1915, Mt. Washington, N. H. (C. W. J.) ; one female, 

 June 20, Jaffrey, N. H. (C. W. J.) ; two females, June 10, 

 1920, Mt. Monadnock, N. H. (C. W. J.) ; one female, June 

 11, 1916, Glen House, N. H. (C. W. J.) ; one female, June 

 24, 1913, Bretton Woods, N. H. (C. W. J.) ; two males, 

 July 17, Kaslo, B. C. (R. P. Currie). 



Alloperla novascotiana, new species. 



(Plate 22, fig. 1.) 



Length to tip of wings, male, 10 mm.; expanse, male, 

 17 mm. 



General color yellow, the prothorax with a dark mar- 

 gin. Head a little wider than prothorax ; yellow with an 

 infuscated mark connecting the ocelli and exending over 

 the clypeus; a dark area behind the eyes; ocelli with a 

 black crescent on the inside ; hind ocelli closer to the eyes 

 than to each other; antennae yellow at the base, infus- 

 cated towards the tip. 



Prothorax transversely oval, nearly twice as wide as 

 long ; yellow with a narrow dark brown margin ; surface 

 slightly rugose, the rugosities somewhat darker. Legs 

 yellow, tarsi a little darker at the tip. Wings greenish 

 hyaline, veins greenish yellow. 



Abdomen yellow with a brown median dorsal stripe and 

 with the posterior margins of the abdominal tergites 

 darker. Cerci yellow at base, infuscated towards the tip. 



Male. Tenth tergite broadly cleft; anterior margin of 

 ninth tergite with a transverse, raised, chitinous, tubercle 

 which is slightly emarginate ; supra-anal process widened 

 into an almost evenly rounded lobe (pestle-shaped as 

 viewed from above) ; subanal lobes small, unmodified ; 

 ninth sternite produced and truncate behind. 



Female unknown. 



Holotype male, Truro, Nova Scotia, July 4, 1913 (R, 

 Matheson, Cornell University Collection). 



Alloperla coloradensis Banks. 



(Plate 22, figs. 4, 5.) 

 1S9S. Chloroperla coloradensis Banks, Trans. Am. Ent. Soc, 25:199. 

 1907. Alloperla coloradensis Banks, Can. Ent., 39:328. 

 1907. Alloperla coloradensis Banks, Cat. Neurop., p. 13. 



Length to tip of wings, male, 8-9 mm.; expanse, male, 



