Patton.] 404 [January 21, 
terior tibiae yellow. Tips of posterior tibiae above the posterior 
tarsi, and dot on each side of ventral segments two to five, 
sometimes testaceous; in one specimen all the femora, except at 
base, reddish yellow. Tip of antennae and the scutellum black. 
The fascia on second abdominal segment broader than in the female, 
and a broad fascia on the sixth segment. More coarsely punctured 
than the female, the punctures almost cdnfluent on thorax beneath 
and behind. A sharp tooth on the inner margin of the mandibles; 
sides of the clypeus with a long silvery pubescence, that at the apex 
forming the “moustache ”’; side lobes small, a black dot at the junc- 
tion of the foveal suture with the median lobe, this dot in one speci- 
men connected by a line with the broad black margin of the clypeus; 
in the other specimen the black margin narrower; median lobe much 
produced and narrowed at apex, the tip slightly bisinuate. Eighth 
ventral segment slightly emarginate at tip, its angles not extending 
beyond the seventh dorsal segment. Waterbury, Conn., July 14, 
and Southington, Conn., July. 
Resembles C. deserta Say, but is not allied. In the expansion of 
the mandibles it resembles C. compar, but the expansion is not so 
great as in that species; the labrum of the male is small as is usual in 
Cerceris, and the labrum of the female is not apparently enlarged. 
In form and appearance the species is very unlike C. compar. 
Cerceris compar Cress. 
In coloration, the male of this species (which is common in Con- 
necticut) varies from the typical form in having a continuous yellow 
line on the scutellum, in having the pectoral spines tipped with yel- 
low, in the fasciae on the abdomen being broader (that on the first 
segment being of even width and those on the other segments being 
considerably dilated at the sides), and in having a narrow twice- 
interrupted fascia on the second and third ventral segments. The 
anterior coxae entirely, the four posterior coxae at the base, and a 
spot on the four anterior tibiae beneath, are black. The foveal 
suture is delicately marked with black. 
The female, hitherto undescribed, closely resembles the male. 
The coxae and trochanters are black, the posterior tibiae are yellow, 
with a black stripe on the apical third within, and the fasciae on the 
fifth, fourth, and sometimes the third abdominal segment, are whit- 
ish. The foveal suture is broadly black, and the angular depression 
beneath the insertion of each antenna is black. 
