ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE, 83 
all of the following segments with pile colored like that on the dorsum. 
Genitalia brown, differing considerably in shape from genitalia of 
T. fulvipes (fig. 116), with more or less yellowish pollen; pile brown- 
ish, short above, long and with a few black hairs intermixed on the 
hypandrium. Femora blackish brown, the apices of femora, tibiae 
except apices, and bases of tarsi yellowish; apices of tibiae and rest of 
tarsi black; pile of femora yellowish, that on the hind femora short 
and reclinate. Wings gray hyaline, the veins brown, the costa and 
subcosta yellow; cell M-3 wide open. In fresh specimens the cross 
veins are evidently clouded brown. 
Female.—Length 10 mm. Very nearly like the male. !'rons much 
broader and with two tufts of brown pile near the middle, one 
each side of the median line. Pile of vertex blackish, on the lower 
third of frons yellow. There is a shallow depression running across 
the middle of the frons. Pile of the mesonotum yellowish, more dense 
than in the male, with a few black hairs intermixed. Abdomen more 
or less greased but evidently almost entirely brownish yellow pollinose, 
the bases of the segments darker; pile of first three segments recli- 
nate, yellowish, the other segments short erect black. Genitalia 
blackish, the short pile and circlet of blunt bristles yellow. 
Type locality —Gull Lake, Saskatchewan, Canada, April 30, 1908, 
on sand by coyote holes (T. N. Willing). 
Type.—Male, in the collection of C. W. Johnson; allotype, female, 
in same. 
The two types are the only speciinens known; they were sent to 
Kroéber for examination and were determined by him as Tabuda ful- 
vipes Walker. 
Genus METAPHRAGMA Coquilleit. 
1894. Metaphragma CoquiLLeEtT, Journ. New York, Ent. Soc., vol. 2, p. 97. 
Head much broader than long; eyes of male separated the width 
of the ocellar tubercle. First antennal joint almost as long as the 
head, much longer than the second and third combined and greatly 
thickened, with long pile but no distinct bristles; the style is apical. 
Head rather flattened and horizontal in shape, the frons and face 
greatly retreating; face thickly pilose; proboscis nearly as long as 
the head. 
General shape of body much as in Thereva. Wing with an extra 
cross vein in cell R-—5, outside of small cross vein and beyond the 
fork of Rs; the wing is otherwise much as in Thereva. 
The presence of this cross vein alone does not seem to be a very 
good generic character and perhaps this species should be placed 
in Xestomyza. 
Genoty pe.— X estomyza planiceps Loew. 
60466—23—Proc.N.M.vol.62——19 
