1912] Eastern Species of Cerceris 19 
long, seen from in front the edge is concave; lateral ocelli as near to 
eyes as to each other; enclosure large, striate, the lateral strie rather 
oblique; abdomen not very broad, basal segment more than one-half 
width of second segment; pygidial area about two and one-fourth times 
longer than broad, nearly twice as broad at base as at tip, but the sides 
are nearly straight; body moderately punctate. 
Length 10 mm. 
From Great Falls, Va., 20 June. By black pronotum, and 
scape it is quite distinct from allies, and omitting these it will 
not fit any other form. 
Cerceris morata Cress. 
Males from Fedor, Lee County, Texas, (Birkmann). The 
pygidial area is about one and a-half times longer than broad, 
broad at base, and fully twice as broad in middle as at the nar- 
row tip. The last joint of antenna is longer than the penulti- 
mate, but not concave behind; the hair-lobes are exceedingly 
large, only about one-third their breadth apart. The second 
segment is yellow in front, instead of behind as usual. I have 
figured the clypeal process of the female from the type. 
Cerceris prominens n. sp. 
2 Black; base of mandibles, a large spot each side between antennze 
and eyes, spot on clypeal process, dot behind eyes, two spots on pro- 
notum, tegule, metanotal stripes, two spots on first segment of 
abdomen, a broad band, deeply, triangularly indented, on second, 
narrow bands on next three segments, yellow. Legs yellow, front 
coxze, and basal part of femora, blackish; rather dark on base of mid 
femora and tip of hind tibia, hind tarsi dusky; scape and first two joints 
of flagellum beneath yellowish. Wings dusky, stigma yellow. Body 
coarsely punctate, clypeal process a little longer than broad, nearly 
square, enclosure with a deep median groove, and lateral, somewhat 
oblique striz; pygidial area two and one-fourth times as long as broad, 
broadest near base, much narrowed at tip (not as narrow as in C. 
clypeata). Venter black, finely punctate. 
o With face all yellow, no metanotal marks, that on second seg- 
ment not indented, front and mid femora black behind, hind femora 
and tibia black on apical half, last joint of antennz fulvous; clypeus 
apparently rounded below, but with three black teeth; hair-lobes about 
one and a half breadth apart; second joint of flagellum much longer 
than third, apical joint scarcely longer than the preceding, curved; 
enclosure smooth in middle, striate on sides; pygidial area about twice 
as long as broad, scarcely broader in the middle, apical corners rather 
prominent. 
Length 13 mm. 
From Falls Church, Va., September and October. 
