BRACHYCOMA. 97 
shorter bristles ; eyes descending beneath the vibrisse; beard whitish, Antenne distinctly shorter than 
the face ; basal joints and the base of the third joint rufous; second joint with black bristles; third joint 
three times as long as the second; arista thickened to the proximal half. Proboscis black; palpi yellowish 
or pale rufous, very slender, almost rudimentary, with long hairs towards the tip. Thorax with greyish- 
cinereous tomentum and four black stripes, which are interrupted at the transverse suture ; scutellum 
cinereous. Abdomen ovate, testaceous in the male, cinereous in the female; first segment black; the 
following segments with black and greyish reflections and a white front margin; macrochste only at the 
hind margins of the third and fourth segments ; in the male the first two ventral segments are black with 
grey front borders, the third testaceous, and the apical segment rufous; in the female the ventral surface 
is blackish-grey. Hind tibise of the male outwardly fringed, but with some longer bristles ; in the female 
with bristles of unequal length. Tegule grey, with a yellowish margin. Wings greyish-hyaline; small 
cross-vein before the middle of the discal cell; apical and posterior cross-veins oblique and curved. 
Hab. Mexico, Rincon, Venta de Zopilote 2800 feet, Acaguizotla 3500 feet, all in 
Guerrero, Atoyac in Vera Cruz (H. H. Smith). 
A female and several male specimens. 
12. Brachycoma fimbriata, sp.n., ¢ ¢. 
Blackish ; thorax grey, with four black stripes; front borders of the abdominal segments whitish; antenna, 
palpi, and legs black ; hind tibie outwardly fringed; scutellum and the sides of the abdomen testaceous 
in the male. 
Length 10°5-11°5 millim. 
Front cinereous, narrowed behind, on the vertex scarcely as broad as the eyes; frontal band black ; frontal 
bristles in the male short, weak, on each side in a single row, in the female somewhat stouter and in a 
double row, descending to beneath the second antennal joint; face and cheeks white ; vibrisse surmounted 
by several shorter bristles, reaching to nearly half the face; beard white. Antenne shorter than the face ; 
second joint bristly ; third joint three times as long as the second; arista thickened to beyond the middle. 
Proboscis and palpi black, the palpi with a more or less rufous tip. The four black stripes on the thoracic 
dorsum interrupted at the transverse suture ; scutellum testaceous in the male, blackish in the female. 
Abdomen black, at the sides usually testaceous, especially in the male; second and following segments 
with whitish reflections on the front borders; macrochet on the hind margin of the third segment and 
on the anal segment, in the male less conspicuous among the black hairs. Legs with weak bristles; hind 
tibies outwardly fringed with bristles ; foot-claws and pulvilli rather elongate in the male, the pulvilli 
yellowish. Tegule whitish. Wings nearly hyaline; small cross-vein a little before the middle of the 
discal cell; apical cross-vein concave ; posterior cross-vein curved. 
Hab. Mexico, Amula 6000 feet in Guerrero (H. H. Smith), Atoyac in Vera Cruz 
(Schumann). | 
Two male and five female specimens. 
13. Brachycoma irregularis, sp.n., ¢. 
Cinereous ; face white; frontal band, four thoracic stripes, hind margins of the abdominal segments, antenne, 
and legs black; scutellum testaceous; palpi rufous; frontal bristles on each side in a double row. 
Length 10 millim. 
Front cinereous, narrowed behind and there narrower than the eyes; frontal band much narrower than the 
pale lateral portions ; frontal bristles on each side in a double row, or somewhat irregular, reaching as far 
as the end of the second antennal joint ; face white, silvery ; eyes descending a little beneath the vibrisse, 
which are surmounted by some shorter bristles; beard whitish. Antenne reaching nearly as far as the 
vibrissee ; second joint bristly ; third joint three times as long as the second; arista thickened to beyond 
the proximal half. Proboscis black; palpi rufous, cylindrical, curved upwards, and with black hairs 
BIOL. CENTR.-AMER., Dipt., Vol. II., March 1890. 0 
