36 NEUROPTERA OF NORTH AMERICA. 



5. T. glacialis ! 



Nemoura (Brachyptera) glacialis Newp.! Proc. Linn. Soc. I, 389,4. Trans. 

 Linn. Soc. XX, 451. Walk.! Catal. 192, 53. N. maura Walk.! Catal. 

 179, 7. (Female.) 



Allied to T. maura; differs in having the occiput verrucose, and 

 the prothorax smoother; the wings in the males rudimentary, the 

 femora unarmed, the ventral appendage quadrangular, flatter. 

 Length to tip of wings 9 15 millim. Alar expanse 2t millim. 

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

 ston). 



* * The second article of the tarsi small, shorter than 

 the others. 



NEMOURA PICTET. 



Wings veiny, flat, transverse veins few, very regular, veins of 

 the pterostigma forming an X ; anal area of the posterior wings 

 large, plicate ; no setae ; the second articulation of the tarsi short. 



1. N. completa. 



Nemoura completa Walk. Catal. 191, 52. 



Black, shining ; head broader than the prothorax, upon the disk 

 a luteous spot; prothorax quadrangular, equal, sides straight, 

 angles subacute, surface subrugulose, a smoother sulcus upon the 

 middle; feet ferruginous; wings hyaline; anterior ones with a band 

 upon the middle and another at apex fuscous, veins fuscous. (From 

 the description of Mr. Walker.) 



Length to tip of wings 8? millim. Alar expanse 14 millim. 



Hob. Nova Scotia (Redman). Unknown to me. May it not 

 belong to Tceniopteryx? 



2. N. albidipennis ! 



Nemoura albidipennis Walk. Catal. 191, 51. 



Piceous, shining ; head broader than the prothorax ; antennae 

 fuscous ; prothorax quadrangular, sides straight, angles subacute, 

 anterior margin a little recurved, disk with a few tubercles ; feet 

 pale luteous, apex of the femora and base of the tibiae fuscous ; 

 abdomen yellowish-fuscous; wings hyaline, veins fuscous, a little 

 margined with fuscous. 



Length to tip of wings 9 millim. Alar expanse 16 millim. 



