18() THOMAS SAY FOUNDATION 



ment 9, narrower at the base and broadly emarginate in 

 the middle, or bilobed. 



Distribution. — The type locality is given as "New York 

 or Philadelphia." 



Arkansas, Marion Co., June 5, 1897 (McE.). 

 Ohio, Lakeside. July 20, 1901; Lake Erie, South 



Bass Island, July. 

 District of Columbia, Washington, June, 1895 (F. 



C. Pratt). 

 New York, Ithaca, June 25. 

 Illinois. Galena. 

 Indiana, Bluffton (C. C. Deam). 

 Tennessee, Knoxville, June 2, 5, and 24. 

 Texas, Kamper's Bluff, V. C, June 25, 1911. 



Acroneuria evoluta Klapalek. 



(Plate 28, figs. 9, 10; plate 30, fig. 11.) 



1909. Acroneuria evoluta Klapalek, Bull. Internal;. Aead. Sei. Bohem., 



p. 12. 

 1922. Acroneuria evoluta Xeedham and Claassen, Can. Ent., 54:253. 



Length to tip of wings, male, 25-28 mm. ; female, 35-37 

 mm. Expanse, male, 42-48 mm. ; female, 60-64 mm. 



Color yellowish brown. Head wider than prothorax, 

 yellow, with a darker area in front of anterior ocellus, an- 

 tennal ridges dark, a little darker over the ocellar triangle 

 and usually a little darker behind the eyes; frontal M- 

 ridge and lateral tubercles yellow, not prominent. The 

 ocelli form an almost equilateral triangle ; hind ocelli quite 

 large and closer to each other tha" to the eves, each with 

 a narrow ring of black pigment. Basal joint of antennae 

 brown, followed bv yellowish and darker segments to- 

 wards the apex. Paloi brownish. 



Prothorax brownish, tending to be much darker than 

 the head, sometimes uniformly brown or else the rugosi- 

 ties yellow; wider than long; narrowed behind, the angles 

 rather sharp; rugosities not strong. Meso- and meta- 

 thorax yellowish, the outer fields a little darker. 



Legs yellowish ; femora with a broad black band just 

 before the distal end, tibia darker on the basal fifth ; tarsi 

 darker at tipl Wings uniformly subh valine or sliehtly 

 brownish ; veins brown, in the hind wing somewhat light- 

 er in color. 



Abdomen yellow, the sides a little darker and some- 

 times darker toward the tip. Tails yellowish ; in some 

 specimens the segments are darker at the tip; covered 

 with rather short hairs. 



