PLECOPTERA OF NORTH AMERICA 241 



it nearly touches costa at the cord where it bends down to 

 meet radius ; no costal crossveins except the short one at 

 end of subcosta and sometimes a faint crossvein in the 

 costal field near the tip of wings ; Rs forks considerably 

 beyond the cord; usually about ten cubital crossveins in 

 forewing. 



Abdomen brown. Cerci of male composed of a single 

 segment, of female about eight to ten segments. 



Male. Supra-anal process short, erect or slightly re- 

 curved, membranous and finely spinulose at the tip, nearly 

 twice as wide at base as at tip; subanal lobes triangular, 

 little modified except that they are unevenly chitinized; 

 cerci composed of a single globose segment more heavily 

 chitinized above, and at the tip usually somewhat emar- 

 ginate; ninth abdominal sternite produced into a sub- 

 genital plate, which reaches to the tip of the abdomen 

 and bears near the center a short ventral lobe. 



Female. Genital opening near the hind margin of the 

 eighth abdominal sternite, the opening not covered by a 

 subgenital plate ; hind margin of ninth abdominal sternite 

 somewhat produced and evenly rounded. 



Distribution. — Feb. 10-March 24, Ithaca, N. Y.; March 

 19, 1913, Honeoye Falls, N. Y. (C. R. Crosby) ; March 21, 

 Adams Center, N. Y. (P. W. Claassen) ; March 14 and 

 April 10, Albany, N. Y. ; March 26, Pike, N. Y. ; April 29, 

 Binghamton, N. Y. ; March 9, March 16, March 23, March 

 29, April 8, Harrisburg, Pa. ; March 22, 1889, Philadelphia, 

 Pa. ; April 4, Athens, Pa. ; March 2, Camphill, Pa. ; Feb. 1, 

 1919, Washington, D. C. (C. D. Duncan) ; March 5, Wash- 

 ington, D. C. (H. S. Barber) ; Feb. 24, 1903, Plummers Id., 

 Md. (W. V. Warner) ; Feb. 19, Feb. 22, Plummers Id., Md. 

 (H. S. Barber) ; March 15, 1905, Raleigh, N. C. (C. S. 

 Brimley) ; 1877, Morgantown, N. C. (Morrison) ; Waldo- 

 boro, Me. (J. H. Lovett) ; Orono, Me. ; Westbrook, Me. (0. 

 0. Stover) ; Durham, N. H. (W. & F.) ; Wellesley, Mass. 

 (A. P. Morse) ; Springfield, Mass. (L. Stebbins) ; April 6, 

 April 22, Winchendon, Mass. (F. W. Russell) ; New Lenox, 

 111., No. 6221 ; Feb. 12, 1906, near Embarrass R., Coles Co., 

 111. 



Taeniopteryx parvula Banks. 



(Plate 44, figs. 1, 2; plate 46, fig. 9.) 

 1918. Taeniopteryx parvula Banks, Bull. Mus. Comp. Zool., 62:7. 



Length to tip of wings, male, 9-12 mm. ; female, 10-14 

 mm. Expanse, male, 15-21 mm. ; female, 18-24 mm. 

 General color brown to blackish. 

 Head brown to blackish, a little wider than prothorax; 



