BRACHYCOMA. 99 
hind margin, Abdomen ovate; first segment black; the following segments cinereous, with black hind 
borders and blackish reflecting spots ; a black dorsal stripe is usually conspicuous; sometimes the second 
and third segments in the male show a tendency to become testaceous laterally ; macrochete are on the 
hind margins of the second and following segments. Middle tibis with some long bristles ; hind tibia 
outwardly with a row of shorter and with some longer bristles ; foot-claws and pulvilli 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 slightly concave; posterior cross-vein nearly straight. 
fab. Mexico, Venta de Zopilote 2800 feet and Amula 6000 feet, in Guerrero 
(1. H. Smith). 
Several specimens of each sex. 
16. Brachycoma incompta, sp. n., ¢. 
Cinereous ; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne, palpi, and legs. 
black. 
Length 8°5 millim. . 
Allied to the preceding species, but differing in the black palpi. The blackish frontal band is sometimes incon- 
spicuous; the face and cheeks have more cinereous reflections; only immediately above the vibrisse are 
some shorter bristles. The antenne are broader, the third joint proportionally shorter (three times as 
long as the second). The macrochete on the abdomen, the legs, and the bristles on the latter are stouter. 
The apical cross-vein is nearly straight. 
Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith). 
A single female specimen. 
17. Brachycoma longicornis, sp. n., 3 (92). 
Blackish, partly with grey tomentum; thorax with indistinct black stripes; scutellum testaceous; head 
whitish; frontal band, antenne, and legs black ; palpi rufous. 
Length 8°5 millim. 
Head white, with dark grey reflections ; front narrowed behind and there nearly as broad as the eyes ; frontal 
band brownish-black, a Jittle narrower than the white lateral portions ; frontal bristles on each side in a 
single row, descending to the number of five beneath the root of the antenne ; vibrisse accompanied by 
several other bristles ; eyes descending to a little beneath the vibrisse. Antenne black, anteriorly with a 
white reflection ; second joint short-haired ; third joint four times as long as the second, reaching as far 
as the vibrisse ; arista thickened to the proximal half. Proboscis black; palpi rufous, elongate, slightly 
thicker towards the tip. Thorax black, with some grey tomentum and four not very distinct black lines ; 
scutellum testaceous, blackish at the base, and with grey tomentum. Abdomen ovate, black, with grey 
and white reflections on the front borders of the second and following segments ; second and third segments 
at the sides slightly testaceous ; a row of macrocheetee on the hind margin of the third segment and 
several macrochete on the anal segment. Front tibie outwardly with a row of short bristles; middle 
tibis: with several long bristles ; hind tibize outwardly with bristles of unequal length. Tegul whitish, 
Wings greyish-hyaline, with a slight brownish tint at the base; small cross-vein a little before the middle 
of the discal cell ; apical cross-vein somewhat concave at its base, for the rest straight ; posterior cross- 
vein curved. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
A single male specimen. 
A. female example from Amula, Guerrero 6000 feet (H. H. Smith), is possibly the 
other sex of the same species. It has, however, the seutellum at the hind margin only 
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