ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 121 
gin on either side (fig. 126); pile of the frons almost wholly black, 
except for a few yellow hairs above the antennae. First antennal 
joint with mixed black and yellow pile. 
Pile of mesonotum shorter than in the male, with more yellow 
anteriorly and laterally; lateral margins and humeri distinctly gray 
pollinose, the thoracic vittae reaching the scutellum and merged with 
the pollen on the prescutellar callosities. The margin of the scutel- 
lum broadly yellowish white pollinose. 
Abdomen marked nearly as in the male, the shining black por- 
tions of the dorsum with black pile, the pile of the lighter parts of 
the first four segments yellow, a few yellow pile on the sides of the 
fifth, the rest of the pile to the tip of the abdomen erect and black, 
both on the dorsum and venter; terminal circlet of spines black. 
Reddish color of the venter more extended than on the dorsum. 
Femora, tibiae, and base of tarsi reddish brown, the trochanters and 
the larger part of the tarsi black; pile of the femora more sparse 
than in the male. Wings asin the male. (Fig. 166.) 
Type locality.—San Francisco, California. 
Type.—tn the Museum of Comparative Zoology at Cambridge. 
Loew described only the female of this species. A male neallo- 
type is designated, the specimen colJected on the sand dunes near 
Golden Gate Park, San Francisco, October 10, 1920, by EK. P. Van 
Duzee, and is deposited in the collection of the California Academy 
of Sciences. 
Distribution—The distribution according to 12 males and 9 
females examined is: California—San Francisco, August 18 (R. H. 
Smith); San Francisco, October 9 (J. A. Kusche); Colma, August 10 
(J. A. Kusche); Ingleside, near San Francisco, October 14; sand 
dunes near Golden Gate Park, October 10 (KE. P. Van Duzee), [all 
Cal. Acad. Sci.]; sand dunes near Golden Gate Park, October 10 
(F. R. Cole), [Cole]. 
This species is more closely related to fucata than to any other 
described species, but is quite distinct in the marking of the frons, 
general coloration, etc. It is probably confined largely to the sand 
dune areas along the coast and is evidently an autumn species. A 
pair was taken in coitu on October 10 by the writer. 
THEREVA PSEUDOCULATA, new species. 
Plate 11, figs. 132 and 153. 
Male.—Length 8 mm. Body black, densely gray or yellowish gray 
pollinose. First joint of antennae as long as the second and third 
combined (fig. 132), gray pollinose, with sparse pile and short black 
bristles; second joint and base of third usually yellowish. Bristles 
of occiput black and rather long and slender. Frontal triangle yel- 
