116 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
Type.—Male, No. 10422, U.S.N.M., from Brookings, South Dakota; 
an allotype female from same place, and a paratype from Montana. 
Distribution.—The distribution according to eight males and two 
females examined is: Canada: Regina, July 25 (T. N. Willing) ; Regina, 
July 8 (J. Fletcher); Duadum, July 15 (A. E. Cameron); Saskatoon, 
July 11 (A. E. Cameron); Prince Albert, July 16 (J. Fletcher), (all in 
the Province of Saskatchewan); Aweme, Manitoba, July 1 to August 
4 (N. Criddle), [all specimens in Canad. Nat. collection.]. 
THEREVA DIVERSA Coquillett. 
1894. Thereva diversa CoquiLLETT, Journ. N. Y. Ent. Soc., vol. 2, p. 100. 
This species was not found in any of the material sent in for exam- 
ination. Krdéber states that the halteres are reddish yellow. The 
type material is probably not all one species. 
Type localities —Colorado, Montana, and Florida. 
Type.—Male, No. 995, U.S.N.M., from Colorado; allotype, female, 
from same; four cotype males from Colorado (2), Montana, and 
Florida. 
THEREVA CINGULATA Kréber. 
Plate 11, fig. 155. 
1912. Thereva cingulata KroseEr, Stett. Ent. Zeit., p. 267. 
The original description is as follows: 
Female.—Frons and vertex yellowish brown pollinose, sparsely weak blackish 
brown pilose. Face white pollinose and pilose. Antennae blackish brown; yellowish 
gray pollinose, black bristled. Second joint and base of third reddish. The callus 
is a triangle, whose tip reaches the front ocellus and in which a pubescent wedge is 
pushed in at the base. Inasmuch as the tip of the callus is buried under pollen, one 
might say that it is composed of two triangular spots. Occiput above yellowish 
brown; below white pollinose and pilose. Post-ocular bristles black. Thorax 
thickly yellowish brown pollinose, opaque, with dull brownish vittae, the middle 
one divided by a red brown, strongly colored line, which reaches to the scutellum. 
Pile reclinate yellow, erect blackish brown. Pleura light gray, snow-white woolly 
pilose. Halteres brownish, the stem paler. Abdomen shining black. First segment 
yellowish gray pollinose, golden yellow pilose. Second to sixth segments with 
yellow pollinose bands, which on the anterior segments are considerably expanded 
laterally. The last segment principally reddish yellow, shining. Pile on all light 
parts pale yellow, on the dark parts blackish brown. Venter at the base whitish 
gray, then light yellow, then brownish yellow. Pile on the first segments long and 
white, on the last short, almost golden yellow. Femora blackish brown, tips dark- 
ened. Wings hyaline; the cross veins and fork clouded pale brownish. Fourth 
posterior cell closed. Length 10 mm. 
Type locality.—Colorado. 
Type.—In the Hofmuseum, Vienna. 
The writer has seen several specimens which seem to answer the 
description of this species; one of the males is designated as a 
neallotype and is described below: 
