86 DIPTERA. 
blackish at the base. Abdomen conical; first segment black; second and third segments cinereous, with 
black hind borders and three oblong black spots, the median spots forming a dorsal stripe which is pro- 
longed over the anal segment; ventral face blackish, densely beset with black hairs, especially the anal 
segment; macrochetz only at the hind margins of the segments. Middle tibia with some long bristles ; 
hind tibia outwardly with bristles of unequal length ; foot-claws and pulvilli very elongate and surrounded 
by bristly hairs; the pulvilli greyish-yellow. Tegule whitish. Wings greyish-hyaline; small cross-vein 
nearly on the middle of the discal cell; curvation of the fourth vein with a right angle; apical and 
posterior cross-veins oblique, the apical concave at the base, the posterior slightly curved. 
Hab. Mrxico, Venta de Zopilote 2800 feet, and Amula 6000 feet, both in Guerrero 
(1. H. Smith). 
Three male specimens. 
20. Phorocera linearis, sp. n., ¢. 
Cinereous; thorax with black lines; abdominal segments with black hind borders; head whitish ; frontal band 
black, linear; antenne and legs black; palpi rufous. 
Length 8°5 millim. 
Front yellowish, a little broader than the eyes; frontal band black, much narrower than the lateral portions ; 
frontal bristles on each side in a curved row, descending to beneath the second antennal joint; face and 
cheeks white ; eyes descending to the vibrissee and with a short whitish pile; beard white. Antenne nearly 
as long as the face; third joint five times as long as the second; arista scarcely thickened at the base. 
Proboscis black; palpi cylindrical, pale rufous. Thorax and scutellum cinereous; thoracic dorsum with 
four somewhat irregular black lines. Abdomen ovate; first segment black, the following segments 
cinereous with black reflecting spots and black hind borders; second segment at the sides slightly 
testaceous ; the anus ends in a stout spine, which is turned under the venter; macrocheete are on the 
hind margins of the second and third segments and there are several on the anal segment. Middle 
tibia with some long bristles; hind tibiee outwardly with many short bristles and a long one below the 
middle; foot-claws and pulvilli elongate and surrounded by bristly hairs; the pulvilli yellowish. Tegule 
white. Wings nearly hyaline, the base and costa with a yellowish tint; small cross-vein on the middle 
of the discal cell; apical cross-vein concave; posterior cross-vein curved. 
Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith). 
Two male specimens. 
21. Phorocera ——? 
Hab. Costa Rica, Cache (Rogers). 
A single female specimen of a species different from those above mentioned and also 
from any described member of the genus. 
As the example is somewhat damaged, it is not advisable to name it. I may observe 
that it closely resembles Baumhaueria parvipalpis (a species described in a subsequent 
page); the general coloration, however, is more grey; the frontal band is blackish; the 
eyes are hairy (though less conspicuously so than in most species of Phorocera); the 
palpi are more developed than in Baumhaueria parvipalpis; the hind borders of the 
abdominal segments are more broadly black; the small cross-vein is just in the middle 
of the discal cell; and the posterior cross-vein is distinctly beyond the middle between 
the small cross-vein and the curvation of the fourth vein. 
