PROSPHERYSA. 121 
8. Prospherysa rufifrons, sp. n.,¢. 
Cinereous; thorax with four black stripes ; abdomen testaceous, with grey reflections ; front, basal joints of the 
antenn, palpi, and the legs partly, rufous; cheeks with some bristles. 
Length 10 millim. 
Front much broader than the eyes, cinereous, usually with a very conspicuous rufous reflection ; frontal band 
proportionately narrow, dark rufous ; frontal bristles on each side in a double row, descending as far as the 
end of the second antennal joint; face and cheeks yellowish-white, the cheeks broad, and here and there 
with rufous reflections; bristles on the facial ridges few in number; some other bristles on the cheeks in 
the middle between the facial ridges and the orbits of the eyes, these bristles shorter than the frontal 
and facial ones. Antenne shorter than the face; basal joimts rufous; second joint with short bristles ; 
third joint black, three times as long as the second ; arista thickened to beyond the middle. Proboscis 
black ; palpi pale rufous, slightly thickened towards the tip. Thorax cinereous ; thoracic dorsum with 
four black stripes, the median of which are linear; scutellum testaceous, with greyish tomentum. 
Abdomen ovate, convex, testaceous, with grey reflections (chiefly on the front borders of the segments) ; 
sometimes a brown dorsal stripe appears, and near it two or more lateral spots; on each of the first 
and second segments a pair of marginal macrochete; on the hind margin of the third segment a row, 
and on the anal segment a double row, of macrochete. Legs rufous, the tibia more obscure, the tarsi 
black ; front tibia outwardly with a row of short bristles; middle tibie with some long bristles ; hind 
tibie outwardly fringed, and with a longer bristle below the middle. Tegule white. Wings greyish- 
hyaline; small cross-vein on the middle of the discal cell; apical cross-vein concave ; posterior cross-vein 
straight. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
A single female specimen. 
9. Prospherysa vilis, sp. n.,3 2. 
Cinereous; frontal band, four thoracic stripes, reflecting spots on the abdomen, antenne (¢ 2), and legs black ; 
palpi rufous; cheeks with some weak hairs ; posterior tibiz dark rufous. 
Length 75-10 millim. 
Allied to P. crebra, and agreeing with it in most of its characters, but differing in the absence of the bristles 
on the cheeks, these in P. vlis being reduced to some fine hairs; the coloration of the insect is generally 
more obscure, and the scutellum blackish, though eften somewhat testaceous on the hind margin. In the 
female the basal joints of the antenne are not rufous, but black, as in the male. The anal segment has, 
in addition to the macrochetz at the hind margin, a second row of macrochetze on the disc. The third 
vein is slightly curved before its end. The male genitals are prominent and nipple-like, as in P. crebra. 
Hab. Muxtco, Chilpancingo 4600 feet, Amula 6000 feet, Xucumanatlan 7000 feet, 
and Omilteme 8000 feet, all in Guerrero (H. H. Smith). 
A large series of specimens. 
-P. crebra and P. vilis are apparently very common species in Mexico. 
10. Prospherysa albifacies, sp. n., 2. 
Cinereous; face and cheeks white; frontal band, four thoracic stripes, reflections on the abdomen, antenne 
(except the rufous basal joints), and legs black ; palpi rufous; cheeks with some weak hairs. 
Length 7°5 millim. 
- Front grey, slightly prominent, much broader than the eyes; frontal band blackish, broad, but narrower than 
the lateral portions; frontal bristles on each side in three rows, somewhat irregularly descending to beneath 
the second antennal joint; face and cheeks with silvery reflections ; bristles on the facial ridges few in 
number; on the cheeks some weak hairs, Antenne shorter than the face; basal joints rufous; third 
joint black, three or four times as long as the second; arista thickened to beyond the middle, the 
BIOL. CENTR.-AMER., Dipt., Vol. II., May 1890. r 
