APPENDIX. 373 



ether parts of the body. It seems to vary in size, I have a 

 specimen less than one-fourth smaller. 



4. A. fascipennis. Black, slightly hairy; wings vari- 

 ed with blackish and hyaline. 



Inhabits Red river of Winnepeek. 



Body deep black, hairs sparse, very short, ferruginous ; 

 head with black short hairs above, and between, the an- 

 tennae; sides of the mouth whitish; hypostoma with dull, 

 yellowish-ferruginous hairs; posterior orbits with silvery 

 hair; thorax with long hairs before the wings; sciitel 

 margined with piceous ; wings with a wide, blackish-brown 

 costal margin from which proceed two oblique bands ; the 

 basal one is dilated and attains the thinner margin, on 

 which it extends from the middle of the basal curve of the 

 wing to the extremity of the first and second nervures ; 

 the second band is irregularly arcuated and is abbreviated 

 near the thinner margin where it terminates in the form 

 of a hook ; on the costal margin near the tip is an oblique 

 spot connected with the costal coloured margin ; poisers 

 fuscous ; capitulura white at tip ; tergum with the se- 

 cond and third segments obsoletely piceous each side ; 

 venter whitish at base ; feet dusky ; tibia pale. 



Length one-fourth of an inch. 



This species coincides with the third tribe in Wiede- 

 mann's arrangement of this genus. It is small, and the 

 wings are prettily variegated. The specimen I obtained 

 is remarkably destitute of hair. 



5. A. costata. Black ; wings hyaline, with a black 

 costal margin, and small anastomosis in the middle. 



Inhabits North-west Territory. 



Body deep black, with very short, sparse, sericeous hairs; 

 thorax with the lateral hairs longer and pale yellowish-ru- 

 fous ; wings hyaline, with a blackish costal margin bound- 



VoL, II. 48 



