PLECOPTEBA OF NORTH AMERICA 169 



and 7-10 beyond ; radial sector with 3 or 4 branches. Ab- 

 domen yellowish, darker towards the tip. Cerci brown, 

 basal segment about as long as the following three seg- 

 ments in the female and somewhat longer in the male. 



Male. Ninth abdominal sternite produced and' rounded 

 behind, at the median basal portion with a rounded knob 

 which is about as wide as long ; from the base of the knob 

 two divergent ridges, the area between them being some- 

 what sunken; tenth tergite partially cleft; supra-anal 

 process consists of a broad rounded membranous lobe 

 whose sides are slightly chitinized ; subanal lobes tri- 

 angular, upturned, pointed. 



Female. Hind margin of eighth abdominal sternite not 

 produced into a subgenital plate. 



Distribution. — Type, male and female, May 21, 1911, 

 Burton, Ga. (J. C. Bradley, in Cornell University Collec- 

 tion). This species is very similar to P. cornelia and may 

 be only a variety of that species. 



Peltoperla maria Needham and Smith. 



(Plate 31, fig. 7.) 

 3916. Peltoperla maria Needham and Smith, Can. Ent., 48:82. 



Length to tip of wings, female, 15 mm. Expanse, fe- 

 male, 27 mm. 



General color brown. 



Head yellowish with a diffused brownish blotch over 

 the median area in front of the ocelli ; ocelli small, about 

 twice as close to the eyes as to each other; antennae 

 brown, somewhat paler at the base. 



Prothorax brown ; the large irregular flat rugosities a 

 little darker; front margin nearly straight, hind margin 

 broadly rounded ; front angles narrowly, hind angles 

 broadly rounded; a little narrowed behind; twice as wide 

 as long. Legs yellowish, a narrow transverse dark band 

 at the tip of the femora. Wings yellowish hyaline, veins 

 brown ; subcosta terminates considerably before the cord ; 

 13-14 costal crossveins before the end of the subcosta 

 and 7-8 beyond ; radial sector with three branches. 



Abdomen yellow, dark at the tip. Cerci brown, the 

 basal segment about as long as the following three. 



Male, unknown. 



Female. Hind margin of the eighth abdominal sternite 

 slightly produced in a subgenital plate which is medially 

 widely notched. 



Distribution. — Type, female, May 20, 1913, Pelham, 

 Mass., (Lucy W. Smith, Cornell University Collection). 



This may prove to be synonym of P. anna Ndm. & Sm. 



