84 DIPTERA. 
15. Phorocera sobrina, sp. n., ¢. 
Cinereous; hind margins of the abdominal segments, antenne, and legs black; palpi and terminal lips of the 
proboscis rufous; no discal macrochete; veins of the wings bordered with a brownish-yellow tint ; third 
vein with bristles. 
Length 8 millim. 
Head white, with grey reflections; front as broad as the eyes; frontal band dark brown; frontal bristles 
stout, descending to beyond the end of the second antennal joint; facial bristles mounting to where the 
frontal bristles finish; beard whitish; pilosity of the occiput greyish. Eyes with a short grey pile. 
Antenne black; second joint bristly; third joint five or six times as long as the second, and reaching to 
the oral margin; arista thickened for nearly half its length. Proboscis, at least its terminal lips, pale 
rufous; palpi of the same colour. Thorax cinereous, with two or four black lines, these sometimes 
disappearing in a more general obscure coloration, in which some grey stripes become visible; scutellum 
cinereous. Abdomen conical; first segment black, shorter than the following ones, which are black with 
grey reflections on the front borders; macrochete are on the hind margins of the segments; the ventral 
side is carinated. Front tibiee with short, the middle and hind tibie with longer bristles. Tegule whitish. 
Wings greyish-hyaline, with a brownish tint on the costa and along the veins; the third vein is slightly 
curved before its end and has a row of short bristles extending from the base to the small cross-vein ; 
this cross-vein rests on the middle of the discal cell; the curvation of the fourth vein forms nearly a 
rectangle; apical cross-vein slightly concave before its end; posterior cross-vein oblique, slightly curved. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
A single female specimen. 
This insect partly agrees with Macquart’s description of Phorocera tenuiseta, from 
Cayenne (Dipt. exot., Suppl. i. p. 186. no. 4); the latter is, however, of somewhat larger 
size and seems to have a more slender shape, the first abdominal segment being 
elongate. 
16. Phorocera setigera, sp.n., 3 9. 
Cinereous ; frontal band, stripes on the thorax, antenne, and legs black; abdomen black, with greyish front 
borders to the segments; no discal macrochete; palpi rufous; wings greyish ; third vein with bristles. 
Length 9°5 millim. 
Closely allied to the preceding species (P. sobrina), but of a larger size. The wings have not a brownish or 
yellowish tint, except at their extreme base; the third vein is also bristly from its base to the small cross- 
vein, but it is not curved before its end; the terminal lips of the proboscis are dark rufous, in the male 
more obscure than in the female; the stripes on the thorax are more conspicuous—sometimes two median 
lines and two other broader stripes appear, and in other directions five rather broad stripes are visible. 
In the male the foot-claws and pulvilli are elongate. 
Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (1. H. Smith). 
Two specimens, one of each sex. 
17. Phorocera macra, sp. n. (@ 2). 
Shining black; head and thorax whitish-grey ; frontal band, antenne, four thoracic stripes, and legs black ; 
second and third abdominal segments with white front borders; no discal macrochxte; palpi rufous; 
hind tibize with long bristles. 
Length 6 millim. 
Of a slender form. Head white, with grey reflections; front not narrowed behind, nearly as broad as the 
eyes; frontal band black, sometimes with a brown tint; frontal bristles on both sides descending a little 
beneath the first antennal joint; facial bristles mounting to beyond half of the face; beard whitish. 
