AMERICAN DIPTERA. 205 



PhoneiitiNCa siinplicior Wheeler et Melander (Fig. 6). 

 Biol. Cent. Am. 1901, Dipt. Suppl. p. 375. 



Black, shining; legs yellow. Autennfe short, black, tbird joint shorter tban 

 the second. Vertex with a purple tinge. Palpi whitish ; proboscis black, about 

 one-third the eye-height. Thorax shining black, with a faint purplish reflec- 

 tion, pleurfe lightly pruinose. Halteres pale yellow. Abdomen black, with a 

 bronze tinge. Legs and coxse yellow, tarsi darker on the last joint. Wings 

 c.inereous-hyaliue, unspotted, veins strongly fuscous, third and fourth veius 

 straight, slightly divergent. 1.5 mm. 



Guerrero and Vera Cruz (Mexico). 



STILiPON Loew. 

 Separated from Drapetis on account of the sides of the front 

 being parallel, not triangular, and the arista dorsal, and not apical. 

 The hypopygium in at least two of our species is very large, and its 

 parts widely open. 



Thorax shining black, hind metatarsi dark 2. 



Thorax cinerascent, legs yellowish Houghii sp. nov. 



2. Abdomen testaceous varipes Loew. 



Abdomen piceous pe«*tiuiger sp. nov. 



Stilpoii varipes Loew. 

 Cent. II, 58. 



Black, abdomen testaceous, halteres fuscous, wings infuscated, second and 

 third sections of the costa subequal. Face white polliuose. Legs yellow, ante- 

 rior femora strongly incrassate, apex of middle femora and outer half of poste- 

 rior femora fuscous, anterior tibiae beyond the base infuscated, posterior tibise 

 fuscous, a little thickened at the tip ; tarsi subfuscous, first joint fuscous, last 

 joint black, hind metatarsi a little thickened. First longitudinal vein and first 

 section of the costa testaceous, basal half of fourth vein weak, rest of veins fus- 

 cous, all the veins broadly bordered with fuscous, except second half of fourth 

 and tip of fifth. 1.7 mm. 



Pennsylvania (Osten Sacken). 



Stilpon peetiniger sp. nov. (Figs. 4, 5). 

 Male. Length 1.5 mm. — Black. Eyes contiguous below antennae. Front but 

 little diverging towards vertex. Antennae yellow at base, with several stout 

 bristles, apical joint minute, fuscous, the long seta subdorsal. Palpi and probos- 

 cis yellow. Thorax shining, abdomen piceous and not shining, except hypopy- 

 gium, which is very asymetrical, though smaller than in Houghii. Legs wholly 

 yellow, except the hind metatarsi, which are incrassate, and the apical joint of 

 tarsi ; fi-ont femora thickened ; hind femora above and below with a row of strong 

 bristles, hind tibiae inwardly and outwardly with a row of bristles, though these 

 are not so closely placed, a little swollen at tip ; middle tibiae beneath at tip with 

 several stout short bristles. All bristles are black. Knob of halteres elongate) 

 well chitinized, punctulate, black, shining. W^ings cinereous-hyaline, veins fus- 

 cous ; first longitudinal and first section of costa not testaceous ; veins not at all 

 bordered with dusky coloration ; fourth longitudinal ends at extreme tip of wing. 



TRANS. AM. ENT. SOC, XXVIII. JULY, 1902. 



