art. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 109 
gray pollinose and yellow pilose. Knob of halteres blackish, the 
stem yellow. 
Abdomen black, shining except on the gray pollinose first segment; 
posterior margins of second to sixth segments golden-yellow pollinose, 
expanding on the sides of second and third; first to fourth seg- 
ments yellow pilose, the pile long and erect at sides, reclinate above; 
the sides of fifth segment yellow pilose, the dorsum and all of the fol- 
lowing segments long, erect black pilose. External genitalia blackish, 
black pilose, the internal organs reddish and golden-yellow pilose. 
Femora black, yellow pilose, with some long black pile on the outside 
of the front pair; tibiae, most of the first tarsal and base of other tarsal 
joints except last, yellowish; the tip of the tibiae blackish. Wings 
gray hyaline, with a small cloud at outside of cell first M-2 and a 
spot at furcation of Rs dark gray, the stigma blackish. 
Female.—Length 10 mm. Very nearly like the male. Pile in 
general shorter, asis usual. Frons with a shining black callus reach- 
ing to the ocellus above but not to the eyes on the sides; dull black 
on the sides of the callus. (Fig. 120.) Abdominal segments one to 
three yellow pilose, the following segments short erect black pilose; 
segments two to seven with golden yellow posterior margins. Wings 
infuscated, especially along the veins and costal border. 
Type locality.—Type, a male, and allotype, a female, the former 
collected at Victoria, British Columbia, July 3, 1919 (W. Downs), the 
latter at the same place, June 30, 1918 (W. B. Anderson). 
Types.—tIn the Canadian National Museum. 
The male type is teneral and is a bred specimen; the eyes are nar- 
rowly separated, but no doubt normal males would be holoptie. 
Paratypes.—The following localities for 4 males and 13 females: 
Canada: The type specimens above mentioned; Savary Island, 
British Columbia, August 11 (R.S. Sherman); Vancouver, British 
Columbia, August 9 (R. 8. Sherman), [both Sherman coll.]; Vancou- 
ver, British Columbia, August 15 (R. C. Treherne); Chase, British 
Columbia, May 25 (W. B. Anderson), [both Canad. coll.]; Victoria, 
British Columbia, August 8 (R. C. Treherne), [Cole]. 
Washington: Forks, Clallam County, July 3 and 4 (H. P. Van 
Duzee), [Cal. Acad. Sci.]. 
Paratype.—Female, No. 25940, U.S.N.M. 
THEREVA EGRESSA Coguillett. 
1894. Thereva egressa CoquitueTt, Journ. N. Y. Ent. Soc., vol. 2, p. 99. 
This species is related to johnsoni and is rather hard to determine 
from the description. No specimens were available for examination. 
Type locality.—Colorado and California. 
Type.—Male, No. 994, U.S.N.M., from Colorado. 
