338 DIPTERA. 
Head in profile somewhat quadrate; front slightly prominent, triangular, the eyes nearly contiguous ; face 
and cheeks whitish-grey, the lower portion of the latter with brown reflections, impressed, and as broad 
as half the longitudinal diameter of the eyes. Antenne blackish-brown, short, inserted on the median 
line of the eyes; second joint with a bristle; third joint double as long as the second; arista long- 
plumose, distinctly thickened at the base. Proboscis black, rufous at the base, thin, longer than the head, 
the terminal lips not thicker ; palpi cylindrical, slender, black, with rufous base. Thorax cinereous, on 
the upperside blackish, with indistinct stripes; scutellum black. Abdomen elongate, cylindrical, 
cinereous, with a black dorsal line, which is more or less interrupted at the incisions; lateral and 
marginal macrochete on all the segments. Legs rufous, the tarsi black; a blackish stripe on the upper- 
side of the front femora; the femora and tibie with many bristles; foot-claws and pulvilli elongate, the 
pulvilli yellowish. Tegule whitish ; halteres pale rufous. Wings with a greyish-rufous tinge; small 
cross-vein under the end of the first vein and distinctly beyond the middle of the discal cell; third and 
fourth veins parallel; terminal section of the fourth vein nearly twice as long as the penultimate section ; 
posterior cross-vein slightly curved. 
Hab. Muxico, Tepetlapa 3000 feet and Amula 6000 feet, both in Querrero 
(H. H. Smith). 
Two male specimens. 
2. Hylemyia urbica, sp. n.,¢. 
Cinereous ; thoracic stripes, a dorsal line on the abdomen, antenna, palpi, and legs black. 
Length 5 millim, . 
Front dark rufous, triangular, the eyes contiguous ; ocellar tubercle prominent; face and cheeks whitish-grey, 
the inferior portion of the latter equalling one-third of the longitudinal diameter of the eyes. Antenne 
black, inserted above the median line of the eyes; second joint with a bristle ; third joint double as long 
as the second; arista distinctly plumose, slightly thickened at the base. Proboscis and palpi black, the 
proboscis of usual shape, with enlarged terminal lips. Thorax and scutellum cinereous; the thorax with 
two black dorsal stripes, laterally whitish-grey ; metanotum grey. Abdomen elliptical, cinereous, with a 
black dorsal stripe ; the segments with lateral and marginal macrochete, arising from black points. Legs 
black, the tibie piceous and with scattered bristles ; foot-claws and pulvilli slightly elongate, the pulvilli 
whitish. Tegule whitish; halteres yellow. Wings greyish-hyaline, with a minute costal spine; the 
neuration as in H. tenuirostris; the posterior cross-vein nearly straight. 
Hab. Mexico, Mexico city (H. H. Smith). 
A single male specimen. 
3. Hylemyia monticola, sp. n., ¢. 
Cinereous ; two bands on the thorax, a dorsal line and transverse bands on the abdomen, antenne, palpi, and 
legs black, the middle and hind femora rufous. 
Length 4:5 millim. 
Front black, triangular, the eyes contiguous ; ocellar tubercle not prominent; face and cheeks whitish-grey ; 
lower part of the cheeks narrow. Antenne black, inserted on the median line of the eyes; second joint 
with a bristle ; third joint nearly three times as long as the second ; arista moderately plumose. Thorax 
cinereous, with two broad black bands, at the sides whitish; scutellum blackish; metanotum grey. 
Abdomen elliptical, cinereous, with a black dorsal line and black front borders to the segments ; lateral 
and marginal macrochexte on all the segments. Legs black, the basal half of the middle femora and the 
basal two-thirds of the hind femora rufous ; foot-claws and pulvilli slightly elongate, the pulvilli yellowish. 
Tegule whitish ; halteres pale yellow. Wings brownish-hyaline; no costal spine ; neuration as in the 
preceding species ; posterior cross-vein straight. 
