

PLECOPTERA OF NORTH AMERICA 181 



Massachusetts, Chicopee, July 7, 1899 (F. Knab). 



Maine, Orono. 



Pennsylvania, Harrisburg, July 19; Philadelphia; 

 Allegheny Co.; Pittsburg; Marysville, July 9. 



Maryland, Near High Island, June 27, 1899 (W. R. 

 Maxon) ; Laurel, June 17, 1912 (E. B. Mar- 

 shall). 



District of Columbia, Washington, July 4, 1870 

 ("Insect Book, plate 26, fig. 4") ; July 5 (W. V. 

 Warner) ; June 25 and July 18 ; June 1, 1893 

 (F.C.Pratt). 



Virginia, Great Falls, June 25 (H. L. Viereck). 



Acroneuria ruralis Hagen. 



(Plate 16, fig. 7; plate 29, figs. 1, 2; plate 30, fig. 13.) 



1861. Perla ruralis Hagen, Syn. Neur. N. A., p. IS. 



1920. Acroneuria ruralis Needham, Bull. U. S. Bur. Fish., 36:274. 

 1922. Acroneuria ruralis Needham and Claassen, Can. Ent., 54:253. 



1862. Acroneuria rupinsulensis Walsh, Proc. Aead. Nat. Sci. Phila., 



p. 363. 

 1883. Acroneuria quehecensis Provaneher, Pet. Faun. Can. Neurop., 



p. 72. 

 1905. Acroneuria attenuate Banks, Psyche, 12:55. 



Length to wing tips, male, 29 mm. ; female, 32 mm. Ex- 

 panse, male, 32 mm. ; female, 59 mm. 



Color brown. Head yellowish brown with the frontal 

 M-mark and clypeus before it darker, a faint transverse 

 wash of brown beyond the rear ocelli. Ocelli large, form- 

 ing an equilateral triangle, the rear ones a little nearer 

 to each other than to the eyes. Antennae brown, darker 

 toward the tip and on the upper side of the basal seg- 

 ment. Palpi yellowish brown. 



Prothorax much wider than long, front and rear mar- 

 gins rounded, the front one even, the rear one a little 

 emarginate in the middle, front angles sharp, hind angles 

 less so. Rugosities upon the sides of the disc not nu- 

 merous nor prominent. Legs dark brown. Femora with 

 a blackish transverse band across the distal end. Wings 

 uniformly subhyaline with brown veins. 



Abdomen pale above and below, darker upon the sides. 

 Tails yellowish at the base, becoming darker posteriorly 

 and partially covered with short hairs. 



Male. Ninth ventral segment with the usual polished 

 hammer which is small and transversely oval. Genital 

 hooks short, flat, triangular, and curved forward at their 

 acute tips. 



Female. Subgenital plate short and very broad, cov- 

 ering usually somewhat less than half of the 9th ster- 



