176 CRABRONID#. 
gitudinal impression between them, extending a little beyond ; 
the antennz black, the scape yellow at the sides, and fulvous 
at its base; the inner orbits of the eye and the clypeus, which 
is convex, covered with a dense silvery pubescence, and the 
lower part of the cheeks less densely so ; the mandibles black, 
their apex piceous or ferruginous, and having an obtuse tooth 
at their base on the exterior. 
The thorax black and shining, and having scattered punc- 
tures; the metathorax with an enclosed subcordiform smooth 
space at its base, with a slight central longitudinal impression, 
the enclosing portion consute, the posterior portion smooth and 
shining, or only slightly punctured, its lateral edges not ridged ; 
the tubercles yellow ; the tegulz testaceous, or their anterior half 
yellow ; and the wings with a dark cloud beyond their centre, 
extending to their edge, the nervures piceous; the legs black, 
with the anterior femora testaceous above, and the intermediate 
ones beneath at their apex, the anterior tibiz in front and above, 
the intermediate above and behind, and the posterior ones with 
a ring at their base, yellow, the anterior tarsi testaceous, the 
intermediate and posterior ones rufo-piceous, the tibiz spinose. 
The abdomen ovato-conical, scarcely longer than the thorax, 
and a little broader, black, with a griseous pubescence, and the 
margins of the posterior segments piceous, the apex of the last 
segment ferruginous 9. 
The ¢ has the antenne simple, and differs in its mandibles 
being yellow at their base, rufo-testaceous in the middle, and 
rufo-piceous at the apex ; the legs yellow, the anterior and in- 
termediate femora having a black stripe behind below, and the 
posterior ones entirely black, the intermediate and posterior 
tibiz with a piceous stain at their apex behind, and the apical 
joints of the tarsi ferruginous. 
$ 9 in my own and 
other Cabinets. 
{4+ This insect presents a remarkable divarication from 
