march, 1864. 253 



coloured stripe in the disk and a shorter one at the base of 

 the wing in the fold and nearly joining the former. Hind- 

 wings dark fuscous. 



Antennas dark purple, tip silvery. Head and face of a 

 brassy hue. Labial palpi and tongue orange-yellow. 



Virginia. Coll. Entomological Society of Philadelphia. 



Wilsonia, n. gen. 



Hind-wings very narrow and acutely pointed, with very 

 long cilia. The costa is dilated near the middle. The sub- 

 median vein is nearly obsolete. The costal vein enters the 

 costa just beyond the dilatation. The subcostal is simple, 

 attenuated and obsolete from the middle of the wing to the 

 base. The discoidal cell is closed by an extremely attenu- 

 ated discal vein, which gives rise to two nervules, the upper 

 of which appears to be a lower branch of the subcostal, but is 

 unconnected with it, and is continued through the discoidal 

 cell to the base of the wing as a false nervule. The median 

 vein runs near the inner margin and subdivides into three 

 equidistant branches. 



Fore-wings lanceolate. The discoidal cell is long and 

 narrow, and appears to be unclosed. The subcostal vein 

 subdivides into five branches, the apical branch bifid, both 

 its nervulets are delivered to the costa behind the tip. The 

 median is 4-branched. The submedian furcate at its base. 



Head smooth, with appressed scales. Without ocelli. 

 Eyes small. Antennas simple, about one-half as long as the 

 fore-wings ; basal joint slightly thickened with scales. Labial 

 palpi recurved, tips equal, at least, to the vertex, rather slender, 

 especially towards the base, with a spreading, limited tuft of 

 scales over the articulation of the middle and terminal joints, 

 and thence to the base smooth and slender ; terminal joint 

 about as long as the middle, roughed Avith scales from its 

 base to the tip, cylindric, pointed and thicker than the basal 

 portion of the middle joint and about as long. No maxillary 

 palpi. Tongue clothed with scales, extremely short. 



