449 SUPPLEMENT. 
with four black stripes, which are interrupted at the transverse: suture ; the outer stripes anteriorly 
truncated and at their posterior end united with a black transverse fascia on the hind margin of the 
thorax. Scutellum yellowish-grey. Abdomen shining black, the sides, the hind margins of the last 
segments, and round the anus densely clothed with short yellowish hairs. Legs shining black ; foot- 
claws yellow, with black tips; pulvilli yellowish. Tegula pale yellow, large, the upper scale much 
smaller than the under scale and brownish on its basal half. Wings greyish-hyaline, with dark-coloured 
veins ; the base fuscous up to the humeral cross-vein and the end of the inferior basal cells; the surface 
between the first and second veins and at the apex slightly infuscated ; neuration as in H. munda. 
Hab. Mrxico!, Atoyac in Vera Cruz and Teapa in Tabasco (H. H. Smith). 
Two males. 
4, Hyalomyia ochriceps. 
Hyalomyia ochriceps, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185". 
Black ; abdomen with metallic reflections ; front ochraceous; wings hyaline, infuscated at the base. 
Length 5 millim. 
Front scarcely as broad as the eyes, obscure ochraceous; frontal band black; face whitish, nearly perpen- 
dicular, the oral margin very slightly prominent ; beard whitish. Basal joints of the antenne obscure 
rufous; third joint black, twice as long as the second. Proboscis and palpi black. Thorax and 
scutellum black; thoracic dorsum anteriorly with traces of darker stripes. Abdomen very shining, 
metallic black, laterally and posteriorly fringed with white hairs, the hind margin of the last segments 
with grey tomentum. Legs shining black; the underside of the front femora piceous ; foot-claws and 
pulvilli not longer than the terminal tarsal joint; the pulvilli yellowish. Wings hyaline, their base 
and the alula brown, the costal cell beyond the first vein greyish ; small cross-vein beyond the middle 
of the discal cell; posterior cross-vein in the middle between the small cross-vein and the arcuate 
curvature of the fourth vein. 
Hab. Mexico, Rincon in Guerrero (H. H. Smith). 
A single male specimen. [According to Mr. Townsend (Canad. Ent. 1893, p. 166), 
H. ochriceps and H. argenticeps seem to be closely allied to H. e@netventris, Will.] 
5. Hyalomyia argenticeps. 
Hyalomyia argenticeps, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185 *. 
Thorax grey, with black stripes; abdomen black; head white, the front with black reflections : Wings 
greyish, slightly infuscated at the base and along the costa. 
Length 6 millim. 
Head silvery-white ; front as broad as the eyes, with black reflections, sometimes appearing velvety-black 
with a narrow white margin next the eyes; oral margin, in profile, somewhat conically projecting. 
Antenne, proboscis, and palpi black; third antennal joint three times as long as the second. Thorax 
grey, with four distinct equidistant black stripes, which are not interrupted at the transverse suture ; 
scutellum black. Abdomen shining black, with metallic-violet reflections, laterally and posteriorly with 
white hairs. Legs shining black ; foot-claws and pulvilli yellow, a little longer than the terminal tarsal 
joints, the claws with black points. Tegule greyish-white. Wings greyish-hyaline, their base, the 
costa beyond the first vein, and the subcostal cell somewhat infuscated ; small cross-vein under the 
middle of the mediastinal cell and beyond the middle of the discal cell; posterior cross-vein distinctly 
before the middle between the small cross-vein and the arcuate curvature of the fourth vein. 
Hab. Mexico !, Xucumanatlan in Guerrero (H. H. Smith). 
A single male specimen. 
