XXVI. PEMPHREDON. 193 
vertex ; the antenne geniculated, inserted at the base of the 
clypeus, but not approximate, subserrate in the ¢ ; clypeus 
transverse, the centre of its anterior margin produced, trun- 
cated, entire, and slightly reflexed ; the dabrum minute, trian- 
gular, entire (in P. morio very large); mandibles very strong, 
spoon-shaped and quadridentate at their apex (in P. morio 9 
bidentate). Tnorax short, ovate, somewhat gibbous; collar 
linear, almost concealed by the gibbosity of the dorsolum ; 
scutellum transverse, lunulate; the metathorax very gibbous ; 
the superior wings with one marginal and two submarginal cells, 
the first submarginal oblong, recewing the first recurrent nervure 
about its centre, the second submarginal square (in P. morio 
nidest towards the marginal) receiving the second recurrent 
nervure near its commencement; the legs moderately long, 
slender, slightly spimose. The aspomen lanceolate, with a 
very long petiole, which viewed laterally is slightly curved and 
longer than the first segment of the abdomen (in P. morio 
only one half as long as the first segment), the last segment 
terminated by an acute spine in the ¢, and canaliculated in 
the 9. 
Type, P. lugubris. Fab. 
+4+ The derivation of the name is rep¢endav, a flying 
insect, and was established by Latreille in his ‘ Précis,’ 
without naming any type; but it may be presumed to 
have been a ¢ of a species of the present genus Dio- 
dontus, from his description of the mandibles. In his 
next work, the ‘ Histoire,’ vol. xiii. p. 325, in naming the 
genus Pemphredon, he does not describe the mandibles, 
but refers to the Crabro lugubris, Fab.—Sphezx unicolor, 
Panz., as the ‘ best determined species of this genus.’ In 
his ‘ Genera’ (which ought to be considered his final view, 
for in his last work, the ‘ Réegne Animal’ of Cuvier, vols. 
iy. and y. he constantly refers to it), he describes the genus 
oO 
