ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 63 
Occiput, cheeks, and face whitish pollinose, with white pile. A dark 
streak from the base of the antennae to the eye margin as in variegata. 
Mesonotum gray pollinose around the margins, the larger portion 
dark brown; a faint pale median vitta, very narrow, and two distinct 
but narrow gray vittae, one on either side of the central stripe. 
Most all of the pile of the mesonotum very short, reclinate, and black, 
so that to the naked eye the mesonotum appears blackish; some short 
reclinate yellowish pile around the margins. Scutellum gray polli- 
nose, darker at the base, with reclinate yellow pile and four black 
marginal bristles. Pleura and coxae black, silvery gray pollinose, 
with white pile. The ha!teres largely blackish, the base of the stem 
yellowish. 
Abdomen black, largely gray pollinose; a basal blackish brown 
triangular mark on the second and third segments, running to the 
posterior margin, fourth segment largely blackish brown above, sev- 
enth segment brownish gray, the eighth shining black. First two 
segments with reclinate yellowish pile, the other segments with short, 
erect black pile. Femora black, gray pollinose, short white pilose; 
base of front tibiae yellowish, the apical two-thirds, and the tarsi 
blackish; four hind tibiae on the basal two-thirds and the base of the 
first tarsal joint yellowish, the rest of the legs black. Wings largely 
brownish gray, the centers of the cells whitish hyaline; stigma black; 
veins yellowish near the base of wing, black beyond; cell M-3 wide 
open. 
Type locality—F¥orks, Clallam County, Washington, July 2 (E.P. 
Van Duzee). 
Type.—¥emale, in the collection of the California Acadamy of 
Sciences. 
This species is very nearly related to the western subspecies of 
variegata, but the male when collected will undoubtedly be found to 
have black pile on the thorax and differences in the genitalia. 
PSILOCEPHALA LUGUBRIS (Macquart). 
1840. Thereva lugubris Macquart, Dipt. Exot., vol. 2, p. 24, pl.5, fig. 2. 
1861. Psilocephala nigra Betiarnt, Saggio di Ditter. Messic., vol. 2, p. 92. 
1863. Thereva morio Ronpant, Archivo per la Zool., vol. 3, p. 44. 
1868. Psilocephala penthopiera ScurnerR, Novara Reise, Dipt., p. 146. 
1912. Psilocephala lugubris Kréper, Stett. Ent. Zeit., vol. 73, p. 237. 
The species is not known from north of Mexico. Kroéber redescribes 
the species in his paper on the North American Therevidae from 
specimens taken in Chile, Bolivia, and Mexico. The frons in the fe- 
male is shining black with two cross impressions. The wings are 
largely blackish brown. 
Type locality.—Chile. 
Type.—In Museum of Lille, France. 
