118 DIPTERA. 
half of the anal segment rufous; macrochet long, on the disc as well as on the hind margins of the 
segments; male genitals with a pair of small projections. Legs rather robust; front femora with a row 
of bristles on the underside and a second row posteriorly ; middle and hind femora with some bristles on 
the underside; front tibie: with short bristles; middle tibiz with three or four long bristles; hind tibie 
outwardly with several bristles of unequal length; foot-claws and pulvilli elongate in the male, the 
pulvilli yellowish ; in the female the third and following joints of the front tarsi slightly dilated. Tegule 
whitish. Wings with a short costal spine, dilute brown on the costa and along the veins; small cross- 
vein nearly on the middle of the discal cell; curvation of the fourth vein rectangular and shortly 
appendiculated ; apical cross-vein concave; posterior cross-vein nearly straight. 
Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith). 
Two male and two female specimens. 
2. Prospherysa ochricauda, sp. n., 2. 
Cinereous ; four thoracic stripes, reflections on the abdomen, antenne, and legs black ; anal segment ochraceous ; 
palpi rufous; arista thickened to beyond the middle. 
Length 10°5 millim. . 
Front slightly prominent, broader than the eyes; frontal band broad, blackish, but not very conspicuous owing 
to the blackish reflections on the sides of the front; frontal bristles proportionately short, on each side in 
a double row, somewhat irregularly descending as far as the end of the second antennal joint; face and 
cheeks whitish, the cheeks broad and with weak hairs; vibrisse inserted a little above the oral margin ; 
bristles on the facial ridges short. Antenne descending to near the vibriss#; basal joints short, dark | 
rufous; third joint black, five times as long as the second; arista thickened to beyond the middle, the 
penultimate joint somewhat distinct. Proboscis black; palpi pale rufous, cylindrical, slightly curved 
upwards. Thorax cinereous, with four black stripes of equal width ; scutellum testaceous, but covered by a 
cinereous tomentum. Abdomen ovate; the first two segments cinereous, with irregular black reflecting 
spots; the third segment yellowish-cinereous, with similar spots; anal segment ochraceous; all the 
segments with long marginal, the second and following segments also with shorter discal, macrochete ; 
ventral surface grey, with a black median stripe. Front tibiae with short bristles; middle tibiee with several 
long bristles; hind tibize outwardly fringed with short bristles and with a longer bristle below the middle. 
Tegule whitish. Wings greyish-hyaline; small cross-vein nearly on the middle of the discal cell; apical 
cross-vein curved at the base, and for the rest straight; posterior cross-vein slightly curved. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Sinith). 
A single female specimen. 
3. Prospherysa trifasciata, sp. n., 2. 
‘Blackish ; thorax whitish-grey, with interrupted black lines; abdomen shining black, with whitish front 
borders to the segments ; antenna, palpi, and legs black. 
Length 7°5 millim. 
Front as broad as the eyes, cinereous, with blackish reflections; frontal band as broad as the lateral portions ; 
frontal bristles rather stout, on each side in a single row; face and cheeks yellowish-white, but sometimes 
with blackish reflections, and appearing very obscure; cheeks narrow; bristles on the facial ridges long, 
but diminishing in length upwards. Antenne shorter than the face; second joint bristly ; third joint four 
times as long as the second; arista thickened in its proximal half. Proboscis and palpi black. Thorax 
with a whitish-grey tomentum; thoracic dorsum with four black stripes—the intermediate stripes linear, 
the outer ones interrupted at the transverse suture; scutellum grey, blackish at the base. Abdomen 
elongate oval; first segment black; the following segments shining black, with the front borders (for more 
than half the length of the segments) greyish-white; all the segments with marginal, the second and 
following also with discal, macrochetz ; ventral surface shining black. Hind tibize with several bristles of 
unequal length. Tegule yellowish-white. Wings greyish ; small cross-vein nearly on the middle of the 
