232 Transactions of the South African Philosophical Society. 



Gen. ODYNERUS. 

 Odynerus (leionotus) whiteanus, sp. nov. 



Black ; the clypeus, mandibles, except at the apex, the outer 

 orbits almost entirely, the sides of the vertex broadly behind, 

 antennae, except the apical eight joints above, pronotum, scutellum, 

 post-scutellum, the sides of the median segment broadly, an irregular 

 spot on the base of the mesopleurae above, the sides and apex of the 

 basal two segments of the abdomen (the black basal mark large, 

 broad at the base and narrowed in the centre), and the other seg- 

 ments almost entirely, red ; the centre and the lower part of the eye 

 incision, a mark above the antennae, broader than long and slightly 

 incised in the middle above, the sides of the clypeus above, a band 

 on the apex of the pronotum, narrowed laterally, a small curved 

 mark on the inner, hinder edge of the tegulae, the raised hinder 

 inner edge of the scutellum, the apex of the first abdominal segment 

 above and of the second all round, yellow. Legs red, the knees and 

 the four hinder tibiae on the outer side pale yellow. Wings fuscous- 

 hyaline, the radial cellule and the apex all round darker violaceous ; 

 stigma dark testaceous, the nervures black. $ and $ . 



Length 11-12 mm. 



Cape Colony. Grahamstown, February ; Brak Kloof. 



Head closely and strongly punctured. Antennae placed below the 

 middle of the face. Clypeus slightly longer than its greatest width, 

 its centre irregularly, longitudinally striated, the oblique sides punc- 

 tured, the apex slightly, roundly incised, depressed in the centre. 

 The apex of the mandibles and their inner side to near the middle 

 black. Pronotum transverse, the sides not projecting much. The 

 apical half of the sides of the scutellum are raised and stoutly keeled, 

 its centre with a smooth furrow, which becomes wider towards the 

 apex ; the sides of the post-scutellum are more stoutly keeled. Sides 

 of median segment broadly rounded. Second abdominal segment 

 barrel-shape, longer than broad. 



The male has the apical half of the clypeus whitish yellow ; it is 

 punctured, not striated ; all the tibiae are more broadly yellow, the 

 antennal hook is stout and is fully longer than the last joint ; the last 

 abdominal segments are largely marked with black ; the punctures 

 on the clypeus do not run into striae. 



The amount of red and yellow on the body varies, as does also the 

 size of the black marks on the basal two abdominal segments, 

 Belongs to the group of 0. tropicus, Sauss. 



