268 A. L. MELANDER. 



ous pollen, with three darker, almost obsolete vittse. Legs slender, covered with 

 short pile and a few black hairs, the front metatarsi of the male moderately 

 thickened, oblong, except for the usual hairs, bearing three or four setae above. 

 Wings blackish, stigma black. 4 mm. 



New Hampshire (Osten Sacken). 



Hilara seriata Loew. 

 Cent. V. 63. 



Front black, a short vitta ascending from the antennae more shining. An- 

 tennsE black, palpi testaceous. Thorax cinereous opaque, with no vittae, the pile 

 and the black setae arranged in regular rows. Scutellum concolorous. Abdomen 

 black, moderately shining, black pilose. Legs together with the coxfe testaceous, 

 the front tibiae towards the apex, and the hind ones, except the base, fuscous, all 

 the tarsi almost black; the front metatarsi of the male thick, ovate; the middle 

 tibiae clothed with erect and rather long pile. Halteres testaceous. Wings cine- 

 reous, stigma dark gray. 2.5 mm. 



New Hampshire (Osten Sacken). 



Note. — Very similar to Hilara gracilis, but the thoracic pile 

 arranged in regular series and the hairs of the middle tibi?e show a 

 difference. 



One specimen from New Jersey seems referable to this species. 

 The stigma is nearly obsolete, however ; all the tibiae are strongly 

 plumose, while the middle metatarsi, as well as the front ones, are 

 thickened. The size is larger than Dr. Loew has indicated. 



Hilara testacea Loew. 

 Cent. V, 64. 



Dark yellow, opaque, clothed with black, rather short and sparse hairs. Head 

 black, cinerasceut, with whitish pollen. The basal joints of the antennae dark 

 yellow, the third joint and its style black. Palpi luteous. Abdomen ringed 

 with blackish fasciae at the base of the individual segments, the fascia often 

 wanting on the first segment. Legs a little lighter than the rest of the body, 

 tarsi wholly fuscous, the apex of the posterior tibiae often infuscated ; front meta- 

 tarsi of the male thickened ; the middle tibiae provided with long pile below. 

 Halteres yellowish. Wings cinereous, towards the costa yellowish, stigma sub- 

 fuscous. 2.8 mm. 



New Hampshire (Osten Sacken). 



Note. — This must not be confounded with Hilara lutea, which 

 has less cinereous wings and the middle tibiae with shorter pile below. 



Hilara Johiisoni Coquillett. 

 Proc. Nat. Mus., 1895, p. 395. 



Black ; the palpi, halteres, coxae, femora and tibiae yellow. Eyes of male sepa- 

 rated over twice the width of the lowest ocellus. Head, thorax and scutellum 

 opaque gray pollinose, that on the thorax somewhat yellowish, their short pile 

 and bristles black ; scutellum bearing four bristles; abdomen subshining, its pile 

 rather long, black. Wings hyaline, stigma dark brown. Proboscis of male 



