1947] 
Cerceridce 
9 
they project below, viewed from side; the ridge on 
sixth ventral forms a sloping rounded lobe with 
several teeth on the margin calodera 
Venter with yellow spots or bands ; the swollen areas 
are scarcely noticeable from side view; clypeal 
projection very faintly tridentate, or the margin 
at least biconcave 24 
24. Lateral face marks reach little above antennae ; rather 
broad at end, supraclypeal mark also short ; scutel- 
lum black, or at most with small spot each side, 
pygidium slender, sides nearly parallel; lateral 
lobe of sixth segment broadly rounded behind and 
with two large, black, blunt teeth ; and usually some 
smaller connecting row or ridge with small teeth ; 
the lateral lobe of fifth segment, though fairly long, 
also shows some small teeth near inner end and 
hind border populorum 
Lateral face marks reach toward top of eyes, supra- 
clypeal mark extends to anterior ocellus ; some- 
times spots or band on vertex, and a curved mark 
back of each eye ; scutellum usually broadly yellow- 
ish or rufous; propodeum usually wholly rufous, 
or black; enclosure large, smooth; pygidium with 
the sides converging toward tip; the lateral lobe 
of the venter of sixth segment is broad, convex, and 
shows several rounded teeth, three on the outer 
corner ; lobe of fifth segment has no distinct teeth. 
Mot a 
25. Enclosure longitudinally striate nigrescens 
Enclosure mostly obliquely striate abbreviata 
Cerceris macrosticta V. & C. 
Viereck and Cockerell, Jour. N. Y. Ent. Soc., 12: 133, 
1904. 
A female from Tucson, Arizona, July (Bequaert). 
Cerceris front at a Say 
Say, West. Quart. Kept., 2: 80, 1823. 
Leconte Ed., 1 : 167, 1859. 
From Flagstaff, Arizona, 29 July (Carpenter) ; Pal- 
