APPENDIX. 371 



ANTHRAX, Latr. 



1. A. alcyon. Wings brown, a hyaline spot near the 

 middle, another at tip in which are two curved brown 

 lines. 



Inhabits North-west Territory. 



Body black, with pale fulvous hair; head yellowish- 

 white, hairs above the antennae black; tip of the hyposto- 

 ma prominent, and with black rigid hairs ; antennx black, 

 basal joint yellowish with black hairs ; vertex black ; occi- 

 put with a very profoundly impressed line above; scutel 

 piceous ; wings dusky, pale brown on the disk, an obso- 

 lete, small, subhy aline spot between the middle and the 

 base ; a large, subtriangular, hyaline spot near the middle, 

 a small portion of which 'is cut off by a nervure; tip with 

 a large, subquadrate-oval, hyaline spot, the two arcu- 

 ated nervures that pass across this spot are margined with 

 blackish ; central cellule widely bilobated at tip, lobes 

 equally approaching the inner margin, a nervure passes 

 from between the lobes to the edge of the wing, an abbre- 

 viated nervure passes from the lobe nearest the base, half 

 way to the inner margin, and another nervure connects 

 this lobe with the third nervure so as to form an additional 

 cellule ; yee^ yellowish ; tarsi black ; venter pale, two last 

 segments black on the disk; tergum with blackish hair on 

 the incisures. 



Length nearly eleven-twentieths of an inch. 



This species seems to approach nearest to Wiedemann's 

 fifth tribe, though the additional cellule will justify its be- 

 ing placed apart ; we observed it frequently on St. Peter's 

 river and on Red river. 



2. A. tegminipennis. Black with pale fulvous hair; 

 wings brownish-black, immaculate. 



