652 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



is brown in color; scutellum largely yellow, upright hairs brown, 

 pilosity yellow; postnotum with silvery white poUinosity. Abdomen 

 black or black-brown, basal four segments opaque, apical four glossy; 

 numerous brown hairs on apical segments, which are longer on apex 

 and laterally; segment underneath basal scale silvery; basal scale 

 brown, fringe pale brownish yellow. Legs yellow, apices of tibiae 

 and whole of tarsi of forelegs, coxse, trochanters slightly, femora 

 indistinctly on center, apical half of tibiae, apices of basal and all 

 remaming jomts except base of second of tarsi of mid and hind legs 

 black; all legs with yellow, long, close-lying pilosity and scattered, 

 upright, black hairs, the first and third fore, second and third mid 

 and huid tarsal joints wdth two long apical paired hairs each; apex 

 of basal joint of hind tarsi extended on posterior surface, second 

 joint on same tarsi with basal scale and constriction; claws with 

 small subbasal tooth. (See fig. 9). Wings grayish, thick vein 

 brown, cross vein at three-fifths from base of subcosta, venation 

 normal. Halteres yellow. 



Length. — 4 mm. 



Type and paraty pes.— Cat . No. 15306, U.S.N.M. 



Ten specimens, Rio Charape, Peru, September 13, 1911, collected 

 by C. H. T. Townsend, after whom the species is named. 



This species bears a very close resemblance to virgatum Coquillett, 

 from which it may be distmguished by the different colored legs, 

 which are very consistently colored throughout the whole series, 

 and also by the almost entirely black postocular cilia and the pale 

 scutellum. 



SIMULIUM NITIDUM, new species. 



Female. — Frons glossy black, almost undusted, sides nearly par- 

 allel, surface hairs black, sparse, confined to near lateral margins; 

 face black with thick opalescent dusting, distinctly broader than 

 frons and almost twice as long as broad, surface hairs sparse, black; 

 antenna? brown, basal two joints and base of third jomt yellow, 

 pilosity white; palpi black-brown; hairs concolorous; postocular 

 cilia black. Mesonotum glossy black, viewed from directly above 

 with a divided pearlaceous central stripe and two broader lateral 

 stripes, neither of which reaches beyond posterior third; the middle 

 stripe extends to anterior margin, but the side stripes are much 

 shorter; when viewed from behind the intervening spaces on scutum 

 are pearlaceous, the anterior extremities of curved stripe being 

 noticeably so, and the stripes already mentioned are glossy black; 

 pilosity yellow, almost hair- like, with a few short black hairs on 

 anterior margins, and several in prescutellar depression, prescutum 

 slightly yellowish; pleurae black, with distinct white poUinosity; 

 scutellum black, pilosity yellow, upright hairs black. Abdomen 

 opaque, velvety black on basal four segments, glossy black on apical 



