100 DIPTERA. 
somewhat testaceous; the palpi black, with the exception of the tips; the stripes on . 
the thoracic dorsum more distinct, at least before the transverse suture ; and the poste- 
rior cross-vein nearly straight. 
18. Brachycoma striatella, sp.n., ¢ 9. 
Grey or somewhat ochraceous ; frontal band, four thoracic stripes, reflecting spots (more or less in three series) 
on the abdomen, antenne, and legs black; palpi rufous. 
Length 6 millim. 
Head similar in coloration to the body (in some specimens grey, in others more ochraceous) ; front of the male 
narrowed behind, in the female broader than the eyes; frontal band narrow; frontal bristles on each 
side in a single row, three of them close to the root of the antenne; eyes descending to the vibrisse, 
which are surmounted by some shorter bristles. Antenne reaching nearly as far as the vibrisse ; second 
joint with short bristles; third joint three times as long as the second; arista thickened to beyond the 
middle. Proboscis black ; palpi rufous, thickened towards the tip. Thoracic dorsum with four distinct 
black stripes, which are united two and two behind; scutellum concolorous with the thorax. Abdomen 
ovate; first segment black; the black reflections on the following segments appear in the form ofa some- 
what interrupted dorsal stripe and two lateral bands ; the hind margins of the second and third segments 
are shining black; a pair of macrochawte on the hind margin of the second segment and a row of macro- 
cheetze on that of the third segment; several shorter bristles on the anal segment. Front tibie outwardly 
with short bristles ; middle tibia with some long bristles ; hind tibie outwardly fringe-like with bristles, 
and with a longer bristle at the middle and another before the tip; foot-claws and pulvilli short. Tegule 
whitish. Wings hyaline; small cross-vein on or a little before the middle of the discal cell; apical and 
posterior cross-veins oblique and very slightly curved. 
Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet, Teapa in Tabasco (H. H. 
Smith). 
A male and three female specimens. 
19. Brachycoma cineracea, sp.n., 2. 
Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, and legs black ; anus 
not infuscated ; palpi slender. 
Length 7°5 millim. 
Front broader than the eyes, pale ochraceous ; frontal band narrow ; frontal bristles on each side in a curved 
row, descending as far as the end of the second antennal joint; face and cheeks whitish, the upper portion 
of the latter pale ochraceous; above the vibrissee some shorter bristles. Antenne descending to near the 
vibrisse ; second joint with short bristles ; third joint three times as long as the second ; arista thickened 
to the proximal half. Proboscis black ; palpi cylindrical, black, not thickened towards the tip, the tip 
itself pale rufous. Thorax and scutellum cinereous ; thoracic dorsum with four black stripes, the median 
stripes inconspicuous behind the transverse suture. Abdomen ovate; first segment black; second and 
third segments cinereous, with black hind borders, blackish reflecting spots, and a black dorsal stripe ; 
anal segment somewhat ochraceous (though not contrasting in coloration with the preceding segments), 
and with a slight continuation of the dorsal stripe, the anus itself not darker ; macrochet on the hind 
margins of the second and third segments and several shorter ones on the anal segment. Front tibiee with 
a row of short bristles ; middle tibize with some long bristles ; hind tibia outwardly with short and some 
longer bristles. Tegule whitish. Wings nearly hyaline; small cross-vein distinctly before the middle 
of the discal cell ; apical and posterior cross-veins oblique, the apical very slightly concave, the posterior 
curved inwards. 
Hab. Mexico, Atoyac in Vera Cruz (Schumann). 
A single female specimen. 
