Annals of the Transvaal Museum. 
149 
third transverse cubital nervure; metanotal area strongly, longitudinally 
striated ; pygidium strongly, irregularly punctured, the apex smooth, 
depressed. Male. 
Length, 8 mm. 
Face and clypeus densely covered with silvery pubescence ; the rest 
of the head and the thorax densely covered with white hair ; apex of 
clypeus in the centre almost trilobate ; the lateral lobes yellow ; punctura- 
tion strong and close, except on the ventral surface of the abdomen, where 
it is fine and sparse, the segments being also more or less aciculated ; 
first abdominal segment three times longer than wide; the hypopygium 
widely incised, the lateral margins longish, triangular; there is a semi- 
circular spot on the sides of the third ventral segment at the apex. 
Cerceris armaticeps, sp. n. 
Ferruginous ; the apical abdominal segments darker coloured, the 
antennal keel, a broad line, slightly narrowed towards the top, on the 
lower half of the inner orbits, the clypeus, except the central part all 
round and the inner half of the outer, a broad line on the inner half of the 
mandibles, a line on the apex of the pronotum, post-scutellum, a spot 
on the basal half of the tegulae, the sides of the first abdominal segment, 
the line gradually widened towards the apex, a line on the apex of the 
second, narrowed gradually inwardly, the centre of the segment with a 
row of dots, a broad band on the third, narrowed towards the centre, 
laterally extending to the apex of the basal fourth, the greater part of 
the second ventral and a broad line, narrowed inwardly, on the outer 
third of the third ; wings hyaline ; the radial cellule and the outer cubital 
fuscous- violaceous, the costa and stigma fulvous, the nervures blackish ; 
both the basal two transverse cubital nervures are roundly curved ; the 
first recurrent nervure is received at the apex of the basal third of the 
cellule. Female. 
Length, 12 mm. 
Warmberg. December. 
The central upper part of the clypeus armed with a distinct triangular 
tubercle or tooth ; tripartite, the upper part projecting outwardly, the 
lower (and larger) obliquely sloping inwardly ; the labrum semicircular, 
bordered by a stout clearly separated keel, the central part flat ; metanotal 
area stoutly, obliquely striated, except at the apex, where the striae are 
transverse ; head and thorax closely, rather strongly, punctured ; pro- 
pleurae with curved striae ; mesonotum longitudinally striated, the 
scutellum more strongly striated ; the upper basal part of the metapleurae 
with fine curved striae, the lower half aciculated ; abdomen strongly, 
closely punctured ; the pygidium about four times longer than wide, 
closely punctured, the centre finely, irregularly reticulated, the ventral 
incision wide, widened towards the apex, commencing shortly behind the 
middle; the sixth to the eleventh joints of the antennae are black above. 
Cerceris jansei, sp. n. 
Rufous ; the apical third of mandibles, the front, the mark extending 
as a small triangle behind and between the ocelli, a large mark on the outer 
