NORTH AMERICAN DIPTERA. 1(5:5 



Outline of brown of-winss nearly strai}i;ht, axillary cell wholly brown. 



2S. folcr. 

 44. — Third alxloniinal segment with a crossband of white tomentuni, thorax and 



seutoUinn copi)ery tonientose 26. scitlila. 



Third abdominal segment destitute of white tonientum, thorax and scutel- 



luni destitute of coppery tomentuni 25. <*lirta. 



45. — Legs reddish, tomentum of abdomen largely reddish 4(). 



Legs black, tomentum of abdomen ))lack and yellowish 40. <liM|>ai*. 



46. — Abdomen broadly reddish on the sides, front tibiae destitute of bristles.. .47. 

 Abdomen (except sometimes the apex) wholly black, front tibise pointed 



with bristles 48. 



47. — Base of wings brownish-black, wings destitute of darker spots. 



31. fiilvoliirla. 

 Base of wings brownish-yellow, wings with five or six darker spots. 



39. iiiipiger. 

 48. — Base of discal cell to small crossvein wholly brown, brown in anal cell ex- 

 tends beyond base of fourth po.sterior cell, autennaj wholly black. 



36. pcrpIe.Ya. 

 Base of di.scal cell to small crossvein never wholly brown, tirst antt'ona! 



joint reddish 49. 



49. — Front coxte and sides of abdomen with numerous black pile 50. 



Front coxfe and sides of abdomen destitute of black pile 51. 



.50. — Pleura destitute of black pile, occiput white tomentose, a white tomentose 



vitta on each side of dorsum of thorax 29. »«yrti$>«. 



Pleura largely black pilose, occiput yellowish tomentose, dorsum of thorax 



destitute of a white tomentose vitta each side .35. palliiitsi. 



51. — Pile of abdomen yellowish or reddish ,33. oditilisi. 



Pile of abdomen white 37. Y'igilaiis. 



52. — Sides of abdomen broadly reddish, second vein strongly curved o-shaiied 



towards its apex, front tibiaj destitute of bristles 45. iiiira. 



Sides of abdomen black, second vein not curved 5-shaped toward its ajiex. 



front tibite usually provided with bristles .53. 



53. — Bristles of thorax and scutellum yellowish, legs reddish 54. 



Bristles of thorax and scutellum black, legs black 27. vsiiia. 



54. — Pile and tomentum of abdomen white 37. vigilsiiiM. 



Pile and tomentum of abdomen yellowish 38. ftiliiitla. 



Descriptions of Species. 



1. Antlirax (l>ipalta) juiictura n. sp. — Front black, reddish below, 

 I)ale yellowish tomentose and i)ilose ; face yellowish, nnicli jiroduced below, pale 

 yellowish tomentose; proboscis projects one-third its length or less beyond epis- 

 toma; first two joints of antennse yellow, the third black or obscure reddish, 

 short conical at its base ; occiput pale yellowish tomento.se. Thorax black, pale 

 yellowish tomentose and pilose; bristles of hind angles yellowish; pleune pale 

 yellowish ])ilo.se; scutellum black, the apex sometimes reddish, its tomentum, 

 pile and bristles pale yellowish. Abdomen black, hind margin of each segment 

 narrowly and the sides sometimes broadly reddish ; tomentum and pile of ab- 

 domen wholly pale yellowish; venter black and reddish, pale yellowish tomen- 



