58 ACADEMY OF NATURAL SCIENCES 



STYGIA Meig. 



8. ELONGATA. — Blackisli, polished; abdomen elongated, in- 

 cisures yellowish. 



Inhabits Pennsylvania. 



Antennas yellowish- white, the third joint dark fuscous, not 

 longer than the preceding joint, but terminated by an elongated 

 style, the second joint is somewhat more robust than the first, 

 which last is not remarkably dilated at tip, neither is it percep- 

 tibly obliquely truncated ; occiput plumbeous ; thorax piceous- 

 black ; humerus with a dull rufous spot, which is continued by a 

 curved line to the origin of the wings ; pleura with a silvery 

 line ; wings hyaline, nervures brown ; poisers yellowish-white ; 

 feet including the coxae white, tarsi dusky; abdomen elongated, 

 depressed ; tergum blackish-brown, darker towards the tip, first 

 segment yellowish at base and tip, second segment yellow- 

 ish on the posterior margin, the two succeeding segments with a 

 spot on each side at tip, terminal segments immaculate ; venter 

 with more of the yellowish color than the black. 



Length rather more than three-tenths of an inch. 



The third nervure of the costal margin is much less distant 

 from the second, than the corresponding nervures of S. sahsea 

 Meig., and the first basal cellule is much less elongated, and the 

 superior branch of the apical fork is much less arquated than in 

 that insect. 



[Wiedemann removes this species to Lomatia, adding at the 

 same time that it probably belongs to some other genus. 

 — Sacken.] [42 ] 



ANTHRAX Latr. 



1. A. MORioiDES. — Black, with numerous ferruginous hairs ; 

 wings deep black with white at tip. 



Inhabits the United States. 



Body black, covered with short prostrate ferruginous hair on 

 the sides of the stethidium; eyes chestnut-brown, widely emar- 

 ginate behind ; wings deep black, opaque, posterior margin from 

 near the tip to the inner angle hyaline white, black portion occu- 

 pying nearly two-thirds of the wing, and deeply dentate at tip, 

 an obsolete hyaline spot near the base, about three in the middle 



[Vol. III. 



