182 THOMAS SAY FOUNDATION 



nite and with a transverse callosity in the middle before 

 its tip. 



Distribution. — Type locality, St. Louis, Mo. 



Pennsylvania, Harrisburg, July 13, 15, 19; May 

 27, West Fairview, June 18. 



Maryland, Plummer's Island, July 12 (H. S. Bar- 

 ber). 



District of Columbia, Washington, June, 1893 (F. 

 C.Pratt). 



Manitoba, Aweme, June 6, 1903 (N. Criddle). 



New York, Lewiston, July 13. 



Kansas, Lawrence, July, 1894 (Hugo Kahl) ; 

 Douglas Co. (E. S. Tucker) ; Lawrence, June, 

 1921 (P. W. Claassen). 



Ohio. Cincinnati, July 12 (J. T. Lloyd). 



Tennessee, Knoxville, June 24, 1891. 



Colorado, Denver, August. 



Illinois. Bloomington (C. C. Adams) ; Moline, 

 August, 1897 ; Savanna, August. 



Wisconsin, Dane Co., May 20. 



Iowa. Fairport, June 8, 1921. 



Acroneuria pennsylvanica Rambur. 



(Plate 16, fig. S; plate 29, figs. 3, 4; plate 30, fig. 8.) 

 1842. Perla pennsylvanica Rambur, Neurop., p. 456. 

 1909. Acroneuria pennsylvanica Klapalek, Bull. Internal;. Acad. Sci., 



Boheme, p. 8. 

 1922. Acroneuria pennsylvanica Needham ami Claassen, Can. Ent., 



54:252. 



Length to wing tips, male, 27 mm. ; female, 31 mm.. Ex- 

 panse, male, 48 mm. ; female, 55 mm. 



Color yellowish brown. Head yellowish, in front a little 

 darker. Frontal M-line weakly developed. Hind angles 

 obscurely touched with brown. Ocelli large, the rear ones 

 closer to each other than to the eyes, tubercles ringed 

 with blackish. Antennae and palpi brown. 



Prothorax a little narrowed to rearward, much wider 

 than long, its angles sharp, front and rear margins 

 rounded, especially the front one, sides straight, ground 

 color yellow with brown rugosities that are not very high 

 nor very numerous. A median longitudinal yellow line 

 traverses the disc. Meso- and metathorax yellowish 

 brown. Legs yellow. Femora with a wide blackish band 

 just before the tip and tibiae with the basal fifth darker 

 in color. Wings uniformly subhyaline with brown veins. 



Abdomen yellow above and below, darker on the sides. 

 Tails brown and hairy. 



