1924] New and Unrecorded American Species of Phor idee 159 
moderate size, with rather weak bristles. Mesonotum shining, 
with minute bristly hairs, longer behind and arranged in rather 
distinct longitudinal rows; one pair of dorsocentral bristles, 
scutellum broader than long, with four equally strong bristles. 
Propleura with a vertical band of bristly hairs below the spiracle, 
a long bristle above it and several bristles near the base of the 
coxa. Mesopleura bare. Second abdominal segment only one- 
third longer than the third, not bristly at the sides; fifth segment 
elongated. Fore tarsi not distinctly thickened, although not 
quite so slender as u«ual. Tibiae finety hairy, but without trace 
of a dorsal seam or setulae. Hind tibia with the dorsal surface 
somewhat expanded and flattened at the tip where it bears 
several transverse rows of minute comb-like setae; hind meta- 
tarsus strongly spinose below. Costa long, extending distinctly 
beyond the middle of the wing, its cilia extremely minute and 
closely placed; first section almost as long as the second and 
third together; third two-fifths the length of the second; fourth 
vein strongly bent at the base, straight beyond; fifth with a 
sharp bend at the middle so that it runs parallel to the fourth; 
sixth straight; seventh curved, well removed from the margin. 
The light veins are all unusually thin and delicate. 
Type from Atherton, Missouri, U. S. A., collected by Dr. 
C. F. Adams. 
This species is extremely similar to A. magnipalpis Aldrich 
from the Lesser Antilles, and were it not for the peculiar chae- 
totaxy of the front, I should be inclined to consider the two 
identical, especially as the fifth wing vein has the peculiar bend 
characteristic of magnipalpis. In the West Indian species the 
frontal bristles show the ordinary disposition, and the inner of 
the lowest reclinate row is not dropped below the post-antennals. 
An examination of my series of A. magnipalpis has disclosed 
another species of this group, also with enlarged palpi in the 
male, but with normal wing venation. This is described below. 
Aphiochaeta opaciventris sp. nov. 
cf*. Length 1.6 mm. Black, the mesonotum more or less 
piceous; pro- and mesopleur<e dark brown; front legs dilute 
piceous, other legs blackish brown. Wings hyaline, venation 
