1947] 
Cerceridce 
13 
Clypeus a little higher than broad, swollen on upper 
part, lower edge with three black teeth; lateral lobes 
higher than broad, upper edge curved, for a short distance 
the lobe is against the eye, hair-lobes no broader than lat- 
eral lobe and several times their breadth apart, of short 
white hair. From above the sides of head behind eyes 
are incurved; hind ocelli fully as near eyes as to each 
other, enclosure smooth, with a shallow median groove. 
First segment of abdomen one and one-lialf times as broad 
as long, more than one-half of width of second segment 
behind, no ridge separates dorsum from basal slope. 
Second segment little longer than third, about as broad as 
third. Last segment with dense, spreading hair each 
side of pygidium, latter nearly twice as long as broad in 
middle, tip truncate, almost as broad as at middle, with 
tine punctures. Venter shining black, second ventrite 
longitudinally sculptured, but punctate on sides as other 
ventrites ; the tip of subgenital plate is more narrow than 
the tip of pygidium, and the corners only slightly project- 
ing, not spine-like. Hind tibia has seven spines above in 
the row. Wings with a long and clear marginal cell, 
second submarginal cell large, the pedicel fully one-third 
of height of cell, the end of second discoidal is further 
beyond end of cell than in most species. 
Length 16 mm. 
A male from St. John, Arizona, 27 July 1931 (G. P. 
Englehardt). Type M.C.Z. no. 27638. 
Cerceris orestes sp. nov. 
Female. Black with white to pale yellowish marks, 
coarsely punctate much as in C. insolita. Face below 
antennae mostly white, the separated spots of insolita are 
here united, lower edge of clypeus black, supraclypeal 
mark reaches only to antennae, rest of high carina black, 
lateral face-marks reach plainly above antennal fossae, 
tip truncate. Lower margin of clypeus slightly convex, 
with six blunt, black teeth, two near middle closer to- 
gether; white of clypeus broader than high, the comma- 
mark above middle, lower third of upper side of lateral 
lobe against eye ; interantennal carina very high and 
