XXI. CRABRO. 177 
the type, in the form of its mandibles, as also in that of 
its abdomen, which is short and thick. I have taken it in 
Battersea Fields, and at Coombe in Surrey. 
Sp. 34. tiprauis. Fab. 
niger, abdomine petiolato, primo segmento nodoso, tibiarum pos- 
ticorum apice rufo. 
length 3—33 lines. 
Fab. Ent. Syst. Sup. 271 ; Panz. F. G. 83.14; V.d. Lind. pt. 2. 73. 35. 
Pemphredon tibialis. Fab. Piez. 315. 4. 
Corynopus tibialis. St. Farg. 3. 803. 1. 
Head black, shining, delicately punctured; an impressed line 
running obliquely on each side of the anterior stemma, and 
passing the outside of the posterior ones; the antennz black, 
the scape beneath yellow; the clypeus covered with a silvery 
pubescence, very much produced, and projecting in front, having 
a sinus on each side; the mandibles black at the base, then 
yellow, and the apex piceous. 
The thorax black, punctured; the metathorax having the 
cordiform space occupying nearly its whole superficies extending 
posteriorly to its apex, enclosed at the sides, towards its apex, 
by a slightly elevated ridge, which becomes obsolete as it ad- 
vances forwards, its base very smooth and shining, the sides 
covered with a grey pubescence ; it has a longitudinal impression 
extending its whole length in the centre, and which from a re- 
gular line becomes a deep fossulet that reaches nearly to its apex ; 
the tubercles and the tegule testaceous; the wings hyaline, 
iridescent, with their nervures piceous; the legs black, with the 
apex of the anterior femora, and their tibiz and tarsi yellow, 
the base of the intermediate and posterior tibiz and the tarsi 
of the former also yellow, and the apex of the intermediate and 
the posterior tibize red, those of the latter most distinctly so; 
the tibize very spinose. 
The abdomen black, punctured, shining; the margin of the 
petiole and of the two or three posterior segments sometimes 
piceous, the anal segment red 9. 
N 
