204 CRABRONIDA, 
one frequently at the base of the clypeus, sometimes inter- 
rupted ; the antennz black, with the scape yellow, excepting 
a small black mark above, and the remaining joints more or 
less fulvous beneath ; the mandibles with a yellow spot at their 
base. 
The thorax black, punctured ; the metathorax with an ovate 
space at its base, rugose, and enclosed in a frame of the shape 
of a horse-shoe, which is very delicately punctured, beyond 
which it is entirely rugose ; the collar, tubercles, and scutellum 
yellow ; the tegulez testaceous, with a yellow spot in front; 
the wings hyaline, their nervures testaceous ; the legs yellow, 
with the base of the femora klack, and a piceous marking to- 
wards the apex of the anterior tibiee, within which, in the pos- 
terior pair, it is ferruginous; the tarsi flavo-ferruginous, and 
sometimes they all have a ferruginous stain, chiefly at the knees ; 
the anterior tarsi slightly ciliated, and the intermediate and pos- 
terior tibize very slightly spinose. 
The abdomen black, punctured, shining, subpubescent, the 
first segment sometimes with a small yellow spot on each side 
at its apex, and occasionally a central longitudinal line, but 
more frequently entirely black, a broad band occupying the se- 
cond, third, fourth, and fifth segments, except their margin, very 
seldom interrupted in the second segment, but generally having 
two minute black spots in the centre of its base, very frequently 
broadly interrupted in the fourth, more frequently reduced to a 
mere small ovate transverse spot upon that segment, with its 
margin testaceous or piceous ¢. 
The ¢ differs in having the yellow more strongly marked on 
the face, and connected with the transverse markings of the 
clypeus; the mandibles yellow, with their apex piceous ; the 
legs generally more ferruginous than in the female; the ab- 
domen with a yellow band upon the second segment, rarely en- 
tire, occasionally reduced to a mere lateral spot, sometimes 
entirely wanting, another band upon the third segment, gene- 
rally interrupted or subinterrupted, an ovate spot on each side 
