112 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
From the description this species is very close to comata. I have 
seen eight males of a form that would answer the description of this 
species. The abdomen is shining black above and below, the poste- 
rior margins of segments two to five bright golden yellow and quite 
broad. The legs are strongly bristled, especially the hind femora 
and tibiae, there being eight or nine strong bristles on the outside of 
the hind femora. The following distribution is known: 
Washington: W. Wash. Terr. (H. K. Morrison), [U.S.N.M.]. 
California: Pacific Grove, May 8 (J. M. Aldrich), [Aldrich}; Carmel, 
Monterey County, May 2 (L.S. Slevin); Santa Cruz, June 3 (E. P. 
Van Duzee), [both Cal. Acad. Sci.]. 
THEREVA FOXI, new species. 
Male.—Length 8.5 mm. A species related to comata Loew and 
very near nigripilosa described above. It differs from the latter 
species in having more bristles on the first antennal joint, the face 
more blackish pilose. The vittae on the mesonotum yellowish brown 
and very distinct. Stem of halteres blackish. Pleura with more 
black pile than nigripilosa or comata, the abdomen shining black 
much as in nebulosa. The projections of the hypandrium are very 
short. Wings with distinct brown clouding along the veins and cross 
veins, all the veins black or blackish brown. 
Type locality—Holotype, a male, collected at Paradise Valley, on 
Mount Rainier, Washington, August 7, 1919 (C. L. Fox). 
Type.—In the California Academy of Sciences. 
There is a male paratype in the collection of the California Academy 
of Sciences taken in the type locality July 30 by Mr. Fox. The 
wings do not have the brownish tinge common to comata and la: k 
the distinctly mottled appearance. 
THEREVA AUROFASCIATA Kréber. 
1912. Thereva aurofasciata KROBER, Stett. Ent. Zeit., p. 263. 
The following is a translation of the original description: 
Male.—Vertex gray-brown pollinose, frons and face more grayish. The long, 
thick, black pile of frons reaches almost to lower corner of eye. Face long white 
pilose, on eye angle a black tuft. Antennae black, black bristled, base of third 
joint reddish. Occiput gray, below long and woolly whitish yellow pilose. Orbital 
bristles black. Thorax blackish brown, yellowish brown pollinose, long and thick 
erect blackish brown pilose. Scutellum like the thorax. Stripes lacking on both. 
Pleura whitish pilose. Halteres blackish brown, stem paler. Abdomen shining 
blackish brown, unusually thick and long pilose. Second to sixth segment with 
sharply marked yellowish gray pollinose bands, which on each segment become 
broader. Second to fourth segments with orange-yellow borders. Pile of abdomen 
above blackish brown, on the sides and venter long, erect, rather thick whitish 
pilose, on the apex reddish yellow. Anal lamellae reddish yellow. Venter black, 
through pollen dull yellowish gray. Second to fifth segments with broad yellow 
bands which, however, on account of pale pollen do not appear so heavy. Wings 
