190 CRABRONID. 
The abdomen black, as long as the head and thorax, finely 
punctured, subpubescent; the margins of the three first seg- 
ments constricted 9. 
The ¢ differs in having a short acute horn between the basal 
joints of the antenne ; the clypeus covered with a silvery pubes- 
cence, and those portions of the legs luteous which are ferru- 
ginous in the 9, and the hypopygium produced into an acute 
upcurved spine. 
g g in my own Cabinet. 
+--+ This species is not uncommon about palings, posts, 
and outhouses. I have not been able to detect its prey. 
The ¢ which V.d. Linden ascribes to it belongs to another 
species. 
Sp. 2. Graciztis. Curt. 
ater, mandibulis maculd lacted, corniculo in utrisque sexibus 
deficrente. 
length 23—2$ lines. 
Diodontus gracilis. Curtis’s Brit. Ent. Vol. 7. fol. 496. pl. 496. 
Head black, thickly punctured ; a longitudinal impression ex- 
tending from the anterior stemma to the middle of the face ; 
the scape of the antennz pale yellow in front; the clypeus 
anteriorly marginate, the margin obsoletely tridentate; labrum 
large, triangular, convex, with a central depression at its base ; 
mandibles with a broad pale yellow stripe, their apex ferruginous 
and bidentate, the inner tooth a molar; the palpi piceous. 
The thorax black, thickly punctured, except the scutellum, 
which is very shiny; the dorsolum with the epaulets of the 
tegule consute, and a slight scratch parallel with the middle of 
the epaulet, a consute longitudinal line on each side towards the 
middle extending from the base to the apex, within which at the 
base there are two slight abbreviated elevated lines; the meta- 
thorax rugose and shiny; the tegule piceous; the wings irides- 
