228 THOMAS SAY FOUNDATION 



gose ; hind ocelli between two and three diameters distant 

 from eyes. Prothorax dark brown, wider than long; me- 

 dian longitudinal field about one-fourth the width of pro- 

 notum ; disc somewhat rugose. Legs blackish brown. 

 Wings blackish, infuscated. 



Male. Seventh and eighth abdominal tergites each 

 with a narrow chitinous collar on the anterior margin, 

 each of these collars bearing two short triangular chiti- 

 nous processes; supra-anal lobe somewhat triangular; 

 cerci unmodified ; subanal lobes broad, angulately up- 

 curved ; titillators slender, as long as subanal lobes ; ven- 

 tral lobe longer than wide, bearing long hair. 



Female. Eighth abdominal sternite produced into a 

 bilobed subgenital plate, notched in the middle, the lobes 

 rounded, and before the notch a rounded raised tubercle. 



Holotype, male, allotype, female, June 25, 1922, Labra- 

 dor Lake, N. Y. (C. R. Crosby, in Cornell University Col- 

 lection) ; two males, five females, June 25, 1922, Labrador 

 Lake (C. R. Crosby) ; one male, one female, July 11, 1905, 

 Brookline, Mass. (C. W. Johnson) ; one male, June 12-22, 

 1901, Adrin Mts., Axton, N. Y. (A. D. MacGillivray and C. 

 0. Houghton) ; one male, June 8-10, 1915, Chipmunk 

 Swamp, Vandolia, N. Y. ; one male, June 11, 1909, Wool- 

 worth Lake, Fulton Co., N. Y. ; two females, May 27, 1919, 

 Ringwood Hollow, Ithaca, N. Y. ; June 29, 1923, Adiron- 

 dack Lodge, N. Y. 



Leuctra glabra Claassen. 



(Plate 41, figs. 9-11.) 

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



Length to tip of wings, male, 6 mm. Expanse, male, 10.5 

 mm. 



General color reddish brown. Head brown, wider than 

 prothorax, covered with rather long pile; hind ocelli at 

 least twice as close to eyes as to each other. Prothorax 

 not narrowed behind, wider than long; front angles very 

 broadly rounded, hind angles sharp; median longitudinal 

 field about one-fourth the width of pronotum ; disc of 

 pronotum slightly rugose. Legs brown. Wings rusty 

 fumose; two to three Cu crossveins beyond M-Cu cross- 

 veins. 



Male. Tergites of abdomen unmodified except nine in 

 which the chitinized portion is reduced to a narrow trans- 

 verse band ; supra-anal lobe triangular ; cerci unmodified ; 

 subanal lobes modified into long slender upcurved proc- 

 eses ; titillators absent ; ninth sternite not much produced 

 posteriorly; ventral lobes absent. 



Female. Unknown. 



