ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 45 
abdominal pile, above and below, short and black, erect beyond the 
third segment; silvery pollen on the sides and posterior margins of 
fifth and sixth segments. Legs and wings as in the male. 
Distribution.—The four males and one female examined were from 
the following localities in Florida: Daytona, April 8 (C. W. Johnson) ; 
St. Augustine, March 13 (C. W. Johnson); Ormond (Mrs. A. T. 
Slosson), [all Cole]; Atlantic Beach, the pair described above (Mrs. 
Slosson), [U.S.N.M.]. 
Kroéber gave Pennsylvania as an additional record in his paper on 
the North American Therevidae, but this record is doubtful. 
PSILOCEPHALA ARIZONENSIS, new species. 
Plate 6, fig. 58. 
This species is in the haemorrhoidulis group and near notata Wiede- 
mann, but has yellow antennae and black femora. 
Male——Length6mm. Frontal triangle dull-gray pollinose, with a 
few black hairs on the lower portion; lower corners of the frons and 
the face silvery gray pollinose. First two antennal joints dull yellow, 
with black bristles; first joint slender (third joint missing). Ocellar 
tubercle gray pollinose and with black pile. The mouth parts black, 
with white pile. Cheeks dull black just below the eye, with short 
black pile on this dark spot. Occiput silvery gray pollinose and 
white pilose. 
Thorax black, gray pollinose, thinly so on the lateral margins; 
largely dark-brown erect pilose, with some reclinate yellow pile and 
a few erect white hairs. A median dark-brown vitta is present as 
in haemorrhoidalis, and on either side a whitish vitta. Scutellum 
eray pollinose and white pilose, with four black marginal bristles. 
Pleura and coxae as in the other species of the haemorrhoidalis 
group. Knobs of the halteres blackish brown, the stems yellowish 
brown. 
Abdomen black, the first segment gray pollinose except for a 
small ‘posterior angle; dorsum of second to sixth segments dense 
silvery pollinose and white pilose; lateral margins of second, third, 
and fourth segments largely shining black; venter silvery gray 
pollinose and white pilose. Genitalia yellow, largely yellowish pilose; 
some black pile on the genitalia and sixth segment. Femora and 
most of tarsi black; the knees, tibiae, except apices, and base of 
tarsi yellowish red. Wings hyaline, veins yellow at the base, brown 
beyond the basal half, the stigma brown; a brown spot outside 
the small cross vein, curving around the outer end of cell first M-2; 
cell M—3 closed and petiolate. 
Female——Length 8 mm. Very nearly like the female of notata, 
but differing in the coloring of the antennae and the legs. The 
