330 Annals Entomological Society of America [Vol. XIV, 
eye-height. Thorax gray pollinose marked with five black vitte, the 
median one narrow in front of suture. Four postsutural and three 
sternopleural macrochaetz. Scutellum pollinose like thorax, yellow 
at apex, bearing three pairs of long marginal macrochaetz and a shorter 
cruciate apical pair. Abdomen conical, gray pollinose on last three 
segments, with dark reflecting spots on dorsum, sides of second segment 
faintly yellow. First segment black, with a pair of weak dorsal and 
lateral marginal bristles. These bristles on the second segment are 
more robust, and it also bears a pair of discals. Third segment with a 
pair of discals and a marginal row, the fourth with a row of both discals 
and marginals. Wings hyaline, veins yellowish. First posterior cell 
open, terminating far before extreme wing tip. Third vein with two 
to four bristles at base. Fourth vein arcuate beyond bend, not appendicu- 
late. Calypteres white. Legs black, knees yellowish. Middle tibia 
with a single stout bristle on front side near the middle, hind tibia sub- 
ciliate. Front pulvilli nearly as long as last two tarsal joints. 
Habitat.—Frio County, Texas. Described from two male 
specimens collected by the author May 4, 1920, from the 
blossoms of Acacia berlandier1, Benth. 
In general appearance this fly is not so robust and more 
densely pollinose than EF. radicum Fabr. It is separable from 
that species by the narrower and much longer third antennal 
segment. The front tarsi of the female is not dilated, and the 
last abdominal segment is black. It differs from Coquillett’s 
penitalis by having yellow palpi, three pairs of long marginal 
scutellar macrochaetz and four postsuturals. 
Pseudochaeta antennalis n. Sp. 
Length 7 mm. Eyes sparsely hairy. Genz, facial depression, 
sides of face, front, and posterior orbits silvery white pollinose. Front 
at vertex as wide as either eye, vitta entire, narrow, widening slightly 
at the base of antenne, opaque, velvety-black. Two pairs of orbital 
bristles, ocellars absent, one posteriorly directed bristle on each side of 
front outside of frontal row, situated about midway between the lower 
ocellus and the posterior pair of orbital bristles; post ocellars well 
developed. Frontals in two rows, descending to base of third antennal 
segment; front, including ocellar triangle, with many long erect hairs. 
Antenne five-sixths as long as face, third joint twice the length of 
second, black, except first joint, apex of second and base of third, 
which are yellowish. Arista long, slender, thickened on basal half, 
penultimate joint as broad as long. Facial depression large and rather 
flat; ridges strongly diverging downward, bristly on lowest one-fifth. 
Sides of face narrow and bare. Cheeks slightly over one-fifth the eye- 
height, with a row of robust macrochaetze along oral margin, and 
numerous long hairs. Vibrissze inserted on a level with the front edge 
of the oral margin. Proboscis short and fleshy, labella large. Palpi 
yellow. Thorax with five black vittee on the dorsum, gray pollinose. 
