HYPOSTENA 147 
frontal bristles descending as far as the root of the antenne; vibrisse inserted at some distance above 
the oral margin ; eyes descending nearly to the inferior part of the head. Antenne shorter than the 
face ; the two basal joints and the base of the third rufous, the latter for the rest blackish 3 second joint 
bristly ; third joint three times as long as the second; arista pubescent, thickened at the base. Palpi 
and terminal lips of the proboscis yellowish. Thorax whitish-grey ; the two median stripes linear and 
more distant from each other than from the outer stripes ; scutellum grey, with the base black. Abdo- 
men elongate-conical, yellowish-rufous, with whitish reflections, laterally transparent ; base of the first 
segment black, the black coloration prolonged in a dorsal band; second and following segments with 
black hind margins (in one specimen, if the insect is seen in another direction, the dorsal band disappears 
in the white reflections, the black points, on which the discal macrochete are inserted, thus appearing 
very conspicuous); macrochetz long; ventral surface with yellowish hairs. Legs rufous, including the 
coxe, which have a whitish-grey tomentum ; tibia more obscure; hind femora brown at the tip; tarsi 
black ; hind tibie slightly curved ; bristles weak ; foot-claws and pulvilli elongate in the male, the pulvilli 
yellowish. Tegule greyish-yellow. Wings brownish; small cross-vein on the middle of the discal cell ; 
curvature of the fourth vein nearly rectangular ; apical cross-vein slightly concave ; posterior cross-veim 
rather distinctly curved. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
One male and one female specimen. In its slender form and rufous coloration this 
insect shows some affinity with Myodia; the third antennal joint is, however, more 
elongate, and therefore the species is better placed here. 
13. Hypostena flavocalyptrata, sp.n., 2. (Tab. IV. fig. 8, wing.) 
Black ; face whitish ; thorax with grey tomentum and four black stripes; abdomen with three yellowish 
bands; palpi rufous ; apical cell in the middle broader than the discal cell. 
Length 8 millim. 
Front a little prominent ; face inclined; vertex nearly as broad as the eyes; frontal band black, as broad. as 
the lateral portions ; frontal bristles descending to beneath the end of the second antennal joint; cheeks 
narrow, the eyes descending to the inferior part of the head. Antenne black, shorter than the face; 
second joint very bristly ; third joint three times as long as the second ; arista thickened in its proximal 
half. Palpi and terminal lips of the proboscis rufous. Thoracic stripes distinct only before the trans- 
verse suture, the surface behind the suture being blacker in colour; scutellum black, with the hind 
margin cinereous. Abdomen black, somewhat shining; front margins of the second and following 
segments yellowish, this colour distinctly limited; discal and marginal macrochete present. Legs 
black ; tibise with several long bristles ; foot-claws and pulvilli short. Tegule yellowish-grey. Wings 
greyish-hyaline, brownish towards the base and costa; small cross-vein a little before the middle of the 
discal cell; third vein bent upwards before its end, thus making the apical cell much broader than the 
discal cell ; apical cross-vein nearly straight; posterior cross-vein curved inwards. 
Hab. Costa Rica, Volcan de Irazu 6000 feet (fogers). 
A single female specimen. 
14. Hypostena deplanata, sp. n., ¢. 
Black ; face and cheeks white ; thorax grey, with black stripes ; abdomen flattened, the anterior half of the 
second and following segments grey; palpi and terminal lips of the proboscis rufous. 
Length 7 millim. 
Front a little prominent; face slightly inclined ; front ochraceous, narrower than the eyes, with nearly parallel 
sides ; frontal band black, enlarged towards the root of the antennz ; frontal bristles descending as far as 
the second antennal joint ; vibrissz inserted at a little distance above the oral margin. Antenne black ; 
second joint bristly ; third joint slender, four times as long as the second ; arista thickened to one third 
U2 
