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 different. 

 Is it a new species ? 



3. T. frigida! 



Taeniopteryx frigida Hagen! 



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

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

 furrows; antennae black; prothorax hardly 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. 



Hob. Maryland (Uhler). 



Is this not N. 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, antennas 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, tibiae 

 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'O; 9 15 millim. Alar expanse 9 2T 

 millim. 



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

 Common. 



