124 PROCEEDINGS OF THE NATIONAL MUSEUM, VOL. 62. 
Colorado: Gunnison (C. F. Baker), [Stanford U.]; Leadville N. F., 
25 miles from Buenavista, September 1 (A. K. Fisher), [Biol. Surv.]. 
Oregon: McDermitt, Malheur County, August 20 (J. R. Bunch), 
{Biol. Surv.]. 
Utah: Deer Creek, Provo County, August 27 (T. Spaulding), [C. 
W. Johnson]. 
California: Sugar Pine, Madera County, 4,300 feet, August 14 (J. 
C. Bradley), [Cornell]; Redwood Mdw., Tulare County, August 4 (J. 
C. Bradley), [Cornell]; Santa Clara County (Harkins); Stanford 
University, October 10; Santa Cruz Mountains [all Stanford U.]; 
Little Bear Valley, San Bernardino County, August [Cal. Acad. Sci.]; 
Mill Creek Canyon, San Bernardino County, 4,000 feet, August 7 
(Cole), [Cole]. 
THEREVA BAKERI, new species. 
Plate 12, fig. 163. 
Male——Length 7.5 to 8.5 mm. In general appearance somewhat 
similar to fucata Loew. Frons yellowish gray pollinose, with black 
pile above, yellow pile on the lower part. Face gray pollinose, the 
sides with black pile down to the cheeks, the central portion yellow 
pilose. Occiput gray pollinose, with black bristles and yellow pile. 
First two antennal joints and base of the third yellowish red, most 
of the third joint and the style brown. A few yellow pile on basal 
part of first antennal joint, the rest of the antennal pile rather long, 
dense, and black. First antennal joint slender, slightly longer than 
the third. 
Thorax gray pollinose, with three sharply defined dark-brown pol- 
linose vittae, the middle stripe blackish brown, those on the sides 
abbreviated anteriorly and posteriorly. Pile of mesonotum mixed 
black and yellowish. Scutellum grayish brown, with yellowish pile 
and four black marginal bristles. Pleura gray pollinose, whitish pilose. 
Halteres yellowish, the knobs partly brown. 
Abdomen largely reddish yellow ; dorsum of the first segment black, 
gray pollinose; second to fifth segments with basal black triangles, 
narrower on the fourth and fifth. Most of the abdominal pile yellow- 
ish, with black pile on the black triangles, upper part of the fifth and 
sixth segments, and the genitalia. Pile of the hypandrium long and 
yellow, dense on the projections. Basal portion of femora blackish, 
the black color more extended on the hind pair; pile of the femora 
mixed black and yellow. Bristles of the legs black. Costal cell and 
veins at base of wing yellowish, the other veins black; most of the 
wing marked with dark gray or smoky brown clouds, the intervals 
whitish (fig. 163); cell second M and first A largely hyaline; cell 
M-3 open in the margin. 
