ART. 4. REVISION OF THE FAMILY THEREVIDAE—-COLE. 69 
is whitish yellow. The femora are yellowish brown to blackish brown. 
Cell M-3 may be narrowly open or closed in the margin of the 
wing; in one specimen examined vein M-3 did not reach the margin 
of the wing. The length is 6 to 7 mm. 
Type localities—New Jersey and Florida. 
Types.—In C. W. Johnson’s collection. 
Distribution.—The distribution according to three males and three 
females examined is: 
New Jersey: Cape May, June 7 (Daecke), [Harrisb. coll.]; Ocean 
City, June 10 (C. W. Johnson), [Cole]; Ocean City, June 10 [M. C. 
Van Duzee]. 
Florida: Gotha, March [Amer. Mus.]. 
PSILOCEPHALA OCCIPITALIS Adams. 
1904. Psilocephala occtpitalis ApAms, Kans. Univ. Sci. Bull., vol. 2, p. 443, female. 
The type is the only specimen known. The antennae are yellow 
with a black tip and arista. The thorax, abdomen, and legs are yel- 
low. 
Type locality —Bill Williams Fork, Arizona. 
Type.—In the Kansas University collection. 
PSILOCEPHALA MARCIDA Coguillett. 
Plate 6, fig. 56, and plate 8, figs. 79 and 97. 
1893. Psilocephala marcida CoqutLtETT, Can. Ent., vol. 25, p. 228. 
Male.—Length 7.5 to 9 mm. Black, largely gray pollinose, and 
white pilose. Pollen in the central part of the frontal triangle golden 
yellow, the rest white. Face yellowish pollinose. Palpi and probos- 
cis yellowish, with white pile. Antennae yellow, rather short, the 
third joint onion-shaped, but laterally compressed (fig. 79), bristles 
very short and black, a few yellow pile on the first joint; arista short 
and black. Occiput and cheeks whitish pollinose and pilose; post- 
ocular bristles yellow. 
Mesonotum gray pollinose, with short reclinate pile; two narrowly 
separated light-brown median vittae, abbreviated posteriorly; on 
either side two narrower and shorter stripes; the median vittae 
abbreviated anteriorly and hardly reaching the scutellum. Bristles 
of the thorax yellow. Scutellum gray pollinose, the margin yellowish 
in ground color and with four yellow marginal bristles. Halteres 
yellow, with some brown color on the knob. 
Abdomen largely blackish gray in ground color, in some specimens 
the dorsum almost entirely yellow, gray pollinose; posterior margins 
of all segments yellow. Genitalia yellow, and yellowish pilose, the 
gonopods attached to the hypandrium long. (Fig. 97.) Venter with 
faint traces of yellow on the posterior margins of segments. Pile of 
