AMERICAN LEPTDOPTERA. 183 



Labial palpi beneath, yellowish white, above these are blackish. Tho- 

 rax, above, bluish black, with yellowish borders to the tegulae within. 

 Underneath, eyaneous, with a yellowish white spot at the side beneath 

 and before insertion of the wings. Abdomen long, bluish black above, 

 with the hind margin of the second basal segment showing a very 

 narrow, distinct, yellowish white band, which does not obtain infeviorly 

 below the stigmatal line; anal tuft concolorous. Beneath, eyaneous 

 black, wuth a broader band on the fourth segment not obtaining above. 

 Legs bluish black ; the anterior femora narrowly lined with yellowish 

 white on their outer edge, these scales extend outwardly at the base of 

 the tibiae which elsewhere are bluish black ; anterior tarsi with pow- 

 dery yellowish white scales. Middle tibiae and tarsi interrupted with 

 yellowish white scales. Hind tibiae neatly interrupted with yellowish 

 white scales at the base of the tibial spurs, and again once promi- 

 nently on the otherwise bluish black tarsi ; the tibiae show some pow- 

 dery white scales inwardly from the apex of the joint to the first pair 

 of spurs. 



Wings translucent or vitreous, almost entirely deprived of scales, 

 the tegument with a yellowish stain. The blackish scales are limited 

 on the primaries to the extreme base of the wing, a narrow costal 

 border, the usual transverse bar at the extremity of the discal cell 

 and the narrow edging of the external and internal margins. The 

 secondaries are wholly pellucid, and show merely a very narrow termi- 

 nal border continued to the base of the wing. Fringes short and 

 blackish. Beneath, as above, but the costal scales from the base out- 

 wards are wholly or shaded with yellowish white to the discal bar, 

 which, with the apical portion of the border, is black, and shows a 

 narrow outer edging of yellowish white scales. 



Expanse, 15 — 16 mil. Length of hoili/, 21 — 22 mil. 



Habitat. — Atlantic District, (Penna.). 



The more purely vitreous wings and the spotted or narrowly banded 

 legs give this species a peculiarly strong hymenopteriform appearance, 

 and distinguishes it from any of our described North American species 

 of the genus. 



ZENODOXUS, n. g. 



Antennae moderate, tapering to the tips, linear, lengthily biciliate, 



inserted approximate to the small eyes. Head small. Labial palpi 



slight, divaricate, porrect, held free from the " front" as in Aegeria. 



Thorax heavy, globose, widening posteriorly. Abdomen short and 



