Some New Genera and Species of Hymenoptera. 217 



black at the apex. Hind ocelli separated from the eyes by the same 

 distance as they are from each other. Thorax closely and strongly 

 punctured, the upper parts less closely than the sides. Abdomen 

 strongly punctured ; the pygidium closely, irregularly longitudinally 

 reticulated, except at the apex, which is almost transverse ; the 

 epipygium ending in two stout, slightly curved piceous spines, which 

 extend backwards to near the middle of the segments as keels. 



Cerceris albigena, sp. nov. 



Black; face, inner orbits broadly to the middle of the eyes, basal 

 half of mandibles, tegulae, two lines on scutellum, a broad mark on 

 the base of the second abdominal segment, rounded laterally and 

 narrowed at the base in the middle, the apex and sides of the third 

 segment, a narrow interrupted line on the apex of the fourth, a 

 shorter broader one of equal width on the fifth, and a small spot on 

 the sides, whitish-yellow. Legs red, the outer side of the tibiae 

 white, the inner side of the hinder tibiae and the hind tarsi infus- 

 cated. Wings hyaline, slightly smoky, the nervures and stigma 

 black. 2 . 



Length 9 mm. 



Cape Colony. Pearston. 



Metanotal area smooth, shining ; a narrow furrow in the centre, 

 ending in a depression at the apex. Front and vertex closely and 

 distinctly punctured. Hind ocelli separated from each other by a 

 slightly less distance than they are from the eyes ; antennal keel 

 large, plate-like, obliquely narrowed at the base and apex and con- 

 tinued above as a narrow keel. Face and clypeus sparsely punc- 

 tured, flat, the cheeks covered with white hair. Apex of clypeus 

 black, depressed in the middle, transverse, the sides ending in short, 

 bluntly rounded teeth ; the sides broadly, roundly incised to near the 

 outer edge. Pronotum rather strongly punctured, broadly depressed 

 in the middle ; mesonotum more sparsely punctured and furrowed 

 in the middle at the base, the scutellum still more sparsely punc- 

 tured. Metanotum regularly punctured, the punctures clearly 

 separated ; the apex broadly depressed. Propleuras irregularly 

 punctured, more strongly above ; mesopleurae strongly and regularly 

 punctured ; the metapleurae aciculated. Abdomen strongly punc- 

 tured ; the first segment thick, about one-fourth longer than thick ; 

 its apex narrowly rufous. Pygidium punctured, except at the apex, 

 narrowed roundly at the base, becoming gradually narrowed towards 

 the apex from the basal fourth ; the apex bluntly rounded and not 

 half the width of the base ; the apieal fourth of epipygium roundly 

 incised. The third segment is largely white below. 



