Annals of the Transvaal Museum. 
163 
darker red ; wings hyaline, tinged with yellow, to near the parastigma, 
the rest fuscous- violaceous ; the costa and basal nervures fulvous, the 
stigma testaceous ; head and thorax covered with white pubescence, the 
abdomen with a white pruinose pile. Female. 
Length, 13 mm. 
Warmberg. December. 
Clypeus pyriform, as long as wide ; the apex depressed, shortly, but 
distinctly bidentate, strongly, closely punctured, the top and sides smooth ; 
front and vertex strongly, closely punctured, except behind the ocelli, 
where it is much more finely and sparsely punctured ; thorax strongly 
and closely punctured, except on the base of the metapleurae where it is 
smooth, the rest being sparsely and much less closely punctured ; the outer 
edges are serrate ; the apex of the scutellum is depressed, the depression 
crenulated and forming a distinct border ; apex of post-scutellum broadly 
rounded ; the second transverse cubital nervure is almost straight and 
is obliquely sloped. 
Apart from the differences in coloration and in size, this species 
may be known from R. transvaalensis by the strongly punctured meso- 
notum and scutellum ; by the crenulated border on the apex of the latter, 
and by the broader, more strongly punctured clypeus. A more closely 
allied species is R. meyeri Cam. from Meru, Massai Land ; it is larger, the 
clypeus is longer and is more finely and closely punctured ; the black 
mark on the vertex is transverse in front and is narrowed behind ; the 
mesopleurae are only red above the basal longitudinal furrow, there are 
three stout teeth on the sides of the metonotum ; the apical five joints 
of the antennae are black and the basal segment of the abdomen is black. 
The affinities of this species and transvaalense are with laterale F. 
(africanum Saus.) and meyeri Cam. The following table shows the 
salient points of distinction between them : — 
1 (4) Thorax strongly punctured above. 
2 (3) Black mark on vertex narrowed behind, transverse in front , 
apical five antennal joints black, metanotum with three 
lateral teeth, basal segment of abdomen black, length 16 
m.m.— Meyeri Cam. 
3 (2) Black spot on vertex not narrowed behind, incised in front ; 
apical three antennal joints black, metanotum untoothed ; 
basal segment of abdomen rufous, length 12 m.m. — 
marginiscutis . 
4 (1) Thorax smooth above. 
5 (6) Antennae with the apical joints not marked with black, the 
pleurae immaculate, sides of abdomen yellow. — Laterale F. 
6 (5) Apical joints of antennae black above, pleurae largely black, 
the sides of abdomen not yellow. — Transvaalense. 
Odynerus Latr. 
Odynerus determinate, sp. n. 
Black ; the clypeus, a mark, twice longer than wide, widened and 
rounded above and with a minute point in the middle, on the lower half 
