PALINGENIA. 4 1 



riorly produced in the middle ; apex of the feet brownish, femora 

 pale ; wings whitish, costa a little obscurer. (From the figure and 

 description of Pictet.) 



Alar expanse 26 millim. 



Hah. New Orleans. Not seen by me. Is it P. alba Say? 



4. P. bilineata ! 



Baetis bilineata Say, Long's Exped. II, 303, 1. P. limbata Pictet, Ephem. 

 146, 3 ; tab. xil. 



Imago J v . Fulvous, antennae pale, basal articulation obscurer; 

 head dusky in front, beneath yellow ; prothorax compressed in the 

 middle, above triangularly tuberculated, each side with a fuscous 

 stripe ; abdomen fulvous, spotted with fuscous ; each side with a 

 medial fuscous stripe composed of oblique striae, margins of the 

 segments fuscous; anterior feet fuscous, basal articles of the tarsi 

 yellow, posterior feet yellow, unguiculi fuscous; setae yellowish, 

 long, apex of the articles annulated with fuscous ; intermediate 

 seta very short; anal appendages yellow, the apex fuscous; penis 

 two-parted, fuscous, apex incurved, oval; wings hyaline, anterior 

 ones with the costal margin fulvous, veins black, some transverse 

 blackish-banded veins ; posterior wings with the apex hardly 

 clouded, transverse discoidal veins banded with blackish-fuscous. 

 Imago 9. Pale yellow; tarsal unguiculi fuscous; abdomen with 

 a fuscous apical band in the middle and interrupted ones on both 

 sides ; wings yellowish-hyaline, costal margin yellowish, longitudi- 

 nal veins yellowish, transverse ones black. 



Subimago 9 . Similar to the imago, the abdomen above ob- 

 scurer, wings opaque. 



Length of body, g 16 ; 9 18. Subimago, 9 22 millim. Alar 

 expanse,^ 34; 9 40. Subimago, 9 48 millim. Length of cau- 

 dal setae, g 46. Subimago, 9 25 millim. 



Hal. St. Peters River, " common" (Say) ; N. Red River (Robt. 

 Kennicott); Maryland (Uhler); Philadelphia; Washington (Osten 

 Sacken) ; St. Louis. The specimens from Washington are yel- 

 lower. 



5. P. limbata ! 



Palingenia limbata Serv. Guer. Icon. Regn. Animal. Ins. tab. lx, fig. 7. 

 Ephemeia limbata Ramb. Neuropt. 295, 4. Walker, Catal. 548, 3. 

 Pal. viridescens Walk.! Catal. 550, 11. Fern. Subimago. Baetis 

 angulata Walk. ! Catal. 564, 28. Male imago. 



