TAENIOPTERYX. 35 



I possess males from Washington, April (Osten Sacken), with 

 the femora unarmed, the ventral appendage narrow, oval, concave, 

 and with the sculpture of the front, anteriorly, a little diiferent. 

 Is it a new species ? 



3. T. frigida! 



Tasniopteryx frigida Hagen! 



Black, grayish-pilose ; head hardly broader than the prothorax, 

 in front fuscous, tubercles flat, polished; anteriorly with two parallel 

 furrows; antennae black; prothorajhardly broader posteriorly, sides 

 straight, anterior and posterior margin subrotund, anterior angles 

 rounded, posterior ones square, with a few flat, polished tubercles, 

 near the anterior margin a transverse biarcuated sulcus, at the pos- 

 terior margin a transverse one ; feet yellowish-brown, femora ex- 

 teriorly, tibiae at base and the tarsi blackish-brown ; abdomen 

 black, shining ; wings subhyaline, a gray band upon the middle 

 and another at the apex, veins fuscous. 



Length to tip of wings 15 millim. Alar expanse 25 millim. 



JIab. Maryland (Uhler). 



Is this not M nivalis Fitch, Winter Ins. 6, 4. Walk. Catal. 

 190, 48? It is certainly a Tceniopteryx, and perhaps T. fasciata 

 Burm.? 



4. T. maura! 



Tseniopteryx maura Pict.! Perl. 361, 6; tab. xlvi, fig. 6. 



Black, opaque ; head equal to the prothorax, rugulose, occiput 

 punctated, antennae blackish-brown ; prothorax broader behind, 

 sides sinuated, oblique, anterior angles rounded, posterior ones 

 subacute, the anterior and lateral margins a little recurved, tuber- 

 cles very few, polished; feet whitish-pilose, femora black, tibige 

 luteous ; abdomen black ; wings grayish-hyaline or fuscous, veins 

 fuscous ; male with shorter wings, the ventral appendage oblong, 

 concave. The same sex has a robust tooth upon the middle of the 

 femora beneath. 



Length to tip of wings, J" 9 ; 9 15 millim. Alar expanse 9 27 

 millim. 



Hah. Philadelphia, Pa. ; Washington, April (Osten Sacken). 

 Common. 



