144 DIPTERA. 
Hab. Mexico, Amula 6000 feet and Omilteme 8000 feet, both in Guerrero, Atoyac 
in Vera Cruz (H. H. Smith). 
Several male and two female specimens. 
6. Hypostena pilosa, sp.n.,¢. (Tab. IV. fig. 7, wing.) 
Black; face and sides of the front yellowish; thorax greyish, with four black stripes; abdomen with greyish 
reflecting spots; wings hyaline. 
Length 8 millim. 
Head yellowish ; front posteriorly narrower than the eyes ; frontal band black, as broad as the lateral portions ; 
frontal bristles descending as far as the end of the second antennal joint; the bristles on the vertex 
longer and stouter than those on the front; cheeks rather broad ; beard and pile of the occiput whitish ; 
vibrissz inserted at some distance above the oral margin, and accompanied by many other bristles. 
Antenne black ; second joint bristly ; third joint three times as long as the second ; arista thickened in 
its proximal half. Palpi black, hairy. Thorax anteriorly and laterally with some greyish-white 
tomentum ; the four black stripes distinct only before the transverse suture; scutellum black. Abdomen 
conical, densely haired, black, with greyish reflecting spots, which usually appear on the front border of 
the second and following segments; many discal and marginal macrochete are present. Legs black, 
slender, bristly ; hind tibie slightly curved, with several long bristles on the outer and inner sides; foot- 
claws and pulvilli elongate, the pulvilli blackish. Tegule brownish. Wings greyish-hyaline; curvation 
of the fourth vein with a blunt angle; small cross-vein nearly on the middle of the discal cell; apical 
and posterior cross-veins oblique, nearly straight, the posterior sometimes slightly curved. 
Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, both in Guerrero, 
Cuernavaca in Morelos (1. H. Smith). 
Four male specimens. 
7. Hypostena umbripennis, sp. n., ¢. 
Yellowish-grey ; frontal band, four stripes on the thorax, and the hind borders of the abdominal segments 
black ; antennz black, somewhat rufous at the base; legs black, the coxe rufous; palpi and terminal 
lips of the proboscis yellow ; wings infuscated towards the end of the costa. 
Length 7 millim. 
Front not prominent, narrower than the eyes; frontal band as broad as the lateral portions; frontal bristles 
weak, descending as far as the end of the second antennal joint; cheeks moderately broad, the eyes 
descending a little beyond the tip of the antenne; vibrisse inserted at some distance above the oral 
margin. Antenne shorter than the face; second joint bristly; third joint four times as long as the 
second ; arista thickened to less than the proximal half. The two median stripes on the thorax are 
linear, the two outer ones broader and interrupted at the transverse suture; scutellum black, with the 
hind margin grey. Abdomen conical, rather convex; first segment black, laterally yellowish; the 
following segments grey (laterally yellowish), with broad black hind borders, the anterior edges of which 
are undulate; the second segment shows a black dorsal line; discal and marginal macrocheete are 
present. Hind tibie outwardly with a row of short bristles and with two pairs of longer bristles (a pair 
below the middle and another before the apex); foot-claws and pulvilli elongate, the pulvilli yellowish. 
Tegule greyish. The brownish coloration of the wings is most obscure on the costa beyond the first 
vein, and becomes more dilute towards the wing’s tip and the hind margin; small cross-vein a little 
before the middle of the discal cell; apical cross-vein very slightly curved ; posterior cross-vein more 
distinctly curved. 
fab. Muxico, Teapa in Tabasco (H. H. Smith). 
A single male specimen. 
