HYPOSTENA. 149 
whitish; second and third abdominal segments without discal macrocheete ; palpi rufous ; wings infuscated 
along the costa. 
Length 8°5 millim. 
Head white, somewhat silvery ; front as broad as the eyes; frontal band black, much broader than the lateral 
portions; frontal bristles descending as-far as the end of the second antennal joint. Antennee black ; third 
joint three or four times as long as the second; arista thickened in its proximal third. Thorax whitish- 
grey, with four black stripes ; the interspaces between the median and outer stripes with dark reflections 
(the thorax thus seeming to have two broad blackish bands) ; scutellum black, with some grey tomentum. 
Abdomen subcylindrical, shining black ; the front border of the second and third segments snow-white, 
this coloration laterally extended; macrochete long, only at, or a little before, the hind margin of the 
segments. Legs black, with rather long bristles ; foot-claws and pulvilli elongate, the pulvilli yellowish. 
Tegule white. Wings brownish, especially towards the costa ; small cross-vein a little before the middle 
of the discal cell; third vein slightly bent upwards before its end; curvature of the fourth vein with a 
blunt angle; apical and posterior cross-veins oblique and nearly straight. 
Hab. Costa Rica, Cache (Rogers). 
A single male specimen. 
18. Hypostena subtilis, sp. n., ¢ 2. 
Grey ; frontal band, four thoracic stripes, a broad hind border to the second and following abdominal segments, 
antenne, and legs black; palpi rufous; no discal macrochate. . 
Length 6-5—10°5 millim. 
Front whitish, slightly prominent and narrowed behind in the male, as broad as the eyes in the female; frontal 
band as broad as the lateral portions; frontal bristles on each side in a single row, descending as far as the 
end of the second antennal joint; eyes descending as far as the tip of the antenne; face, cheeks, and 
beard white. Antenne shorter than the face; second joint with some bristles; third joint narrow, four 
times as long as the second; arista thickened not quite to the middle. Proboscis black, its terminal lips 
and the palpi pale rufous, the palpi filiform. Thorax and scutellum light grey (¢) or cinereous (2); the 
median thoracic stripes linear, the outer ones interrupted at the transverse suture. Abdomen conical ; 
first segment black, as long as the second; the second and following segments shining black, with 
whitish front borders, which in the male are laterally broader; the segments have long marginal macro- 
cheetee; the anal segment (when viewed from the side) is truncated in the male, and has many macrochete. 
Legs long and slender ; all the tibize with some long bristles; foot-claws and pulvilli elongate in the male, 
the pulvilli yellowish. Tegule whitish. Wings greyish-hyaline ; small cross-vein on the middle of the 
discal cell; third vein slightly curved before its end; fourth vein with a blunt angle; apical and posterior 
cross-veins nearly straight. 
’ 
Hab. Mzxico, Xucumanatlan 7000 feet and Omilteme 8000 feet, both in Guerrero 
(H. H. Smith). 
Several male and some female specimens. One of the latter has black palpi: but as 
it only differs from the others in this respect, I regard it as conspecific. | 
19. Hypostena nubilosa, sp. n., ¢ (2%). 
Yellowish-cinereous; frontal band, four thoracic stripes, a broad hind border to the second and following 
abdominal segments, antenne, and legs black; palpi rufous; wings infuscated on the costa and on the 
small cross-vein. 
Length 6:5 millim. 
Front narrowed behind, nearly as broad as the eyes; frontal band as broad as the lateral portions ; frontal 
bristles on each side in a single row, descending to beneath the second antennal joint; eyes descending as 
far as the tip of the antenne ; vibrisse inserted at the oral margin; beard white. Antenne nearly as 
long as the face; second joint bristly ; third joint narrow, four or five times as long as the second ; arista 
