48 NEUROPTERA OF NORTH AMERICA. 



11. B. invaria. 



Baetis invaria Walk. Catal. 568, 37. 



J* Imago. Pale ferruginous, beneath fulvous; antennae black, 

 at base ferruginous ; feet testaceous ; wings hyaline, transverse 

 veins pale- whitish. (From Mr. Walker's description.) 



Length of body 5 6 millim. Alar expanse 14 18 millim. 



Hab. St. Martin's Falls, Albany River, Hudson's Bay (Barn- 

 ston). Perhaps the male of the preceding species? 



12. B. annulata. 



Baetis annulata Walk. Catal. 567, 34. 



Imago. Ferruginous, beneath testaceous ; antennae fus- 

 cous, base ferruginous ; thorax with two testaceous stripes ; ab- 

 dominal segments with a testaceous, triangular spot each side ; 

 seta; whitish, the incisures black; feet whitish, banded with black; 

 wings hyaline, veins black. (From Mr. Walker's description ) 



Length of body 10 millim. Alar expanse 26 millim. 



Hab. Trenton Falls, New York. 



The mutilated specimens from Trenton Falls, cited under B. 

 canadensis, may belong here, only they are of smaller size. 



13. B. vicaria! 



Baetis vicaria Walk. Catal. 565, 30. 



Imago. Ferruginous ; antennae black ; sides of the thorax 

 marked with yellow ; segments of the abdomen banded with fus- 

 cous ; seta? pale testaceous, subannulated, more than twice the 

 length of the body; feet testaceous, femora with two black bands, 

 anterior feet obscurer, wings hyaline, anterior ones with the costal 

 and discoidal veins brownish-black, costal margin at the apex 

 dusky, obscurer farther in. Imago and subimago, male and female. 



Length of body 12 millim. Alar expanse 30 millim. Setce 20 

 30 millim. 



Hab. St. Lawrence River ; Chicago ; Washington ; Savannah 

 (Osten Sacken). Is it distinct from B. canadensis^ 



14. B. femorata. 



Baetis femorata Say, Godman's West. Quart. Rep. II, 162, 1. 



J*. Fuscous, abdomen beneath whitish, setse double the length 

 of the body; femora with a middle and apical reddish-brown band ; 



