XXI. CRABRO. 179 
stemma, behind which it becomes a slightly elevated ridge, 
which passes a little beyond the posterior ones ; the inner orbits 
of the eyes and clypeus covered with a silvery pubescence ; the 
antenne black, with the scape entirely yellow, the pedicel tes- 
taceous, sometimes piceous, and the underside of the basal joint 
of the clavolet piceous; the clypeus slightly produced, and pro- 
jecting in front ; the mandibles yellow, rufescent at their apex. 
The thorax black, delicately punctured, slightly shining ; the 
dorsolum with two central parallel impressed lines at its base 
terminating towards the disk ; the metathorax quite smooth and 
shining at the base in front, in the centre of which there is a 
slight variole and a deep fossulet commencing about its centre, 
and extending to the apex; the sides covered with a sericeous 
down, and at the sides of the base sometimes very delicate 
longitudinal striz ; the tubercles yellow-testaceous ; the tegule 
testaceous ; the wings iridescent, the nervures piceous; the an- 
terior and intermediate legs entirely yellow, excepting the base 
of the femora only, which are piceous, and a piceous patch inside 
of the intermediate tibize, the posterior pair black, with the 
apex of their coxe and base of the tibiz yellow, their tarsi 
piceous ; the intermediate and posterior tibize spinose. 
The abdomen red, with the petiole (except its margin) and the 
base of the first segment, black, and the fifth segment generally 
piceous, sometimes the third segment only red, and the margin 
of all piceous 9. 
The ¢ differs in having the sixth joint of the antennz emar- 
ginate, and all the joints slightly coloured above; the anterior 
portion of the metathorax very delicately longitudinally striate, 
extending in the form of a semicircle from the base, beyond 
which it is delicately punctured, a central longitudinal impres- 
sion extending its whole length, and connected with the fossulet 
observed in the ¢, and more pubescent about the same part; 
the margin of the second segment, and base of the third only, 
red, 
$ ¢ in my own and Rev. G. T. Rudd’s Collections. 
nN 2 
