Annals of the Transvaal Museum. 
211 
finely, distinctly, closely punctured all over, the metapleurae much more 
coarsely and more closely punctured. Female and male. 
Length, 6 mm. ; terebra, 7 mm. 
Lekkerwater (Zoutpansberg District). September. Groenvlei (Pretoria 
District). January. 
The pubescence is short and white. 
Macrocentrus nigro-ornatus, sp. n. 
Luteous ; the stemmaticum, mandibular teeth, the greater part of 
the metanotum, the first abdominal segment and the basal half of the 
second, black ; wings hyaline, the stigma fuscous, pale at the base and 
in front, the nervures black, the first abscissa of the radius about two-thirds 
of the length of the second, the second transverse cubital nervure about 
two : thirds of the length of the first ; the cubitus at the second cubital 
cellule roundly curved. Parapsidal furrows smooth ; the metanotum 
shagreened, the basal two segments of the abdomen finely closely striated. 
Propleurae smooth, the mesopleurae smooth above and at the apex, the 
rest punctured, but not very strongly or closely, the metapleurae more 
strongly and closely punctured. Female. 
Length, 5 mm. ; terebra, 5 mm. 
Pretoria. October. 
The legs, especially at the base, are paler, more yellowish in colour. 
Macrocentrus annulicornis, sp. n. 
Luteous ; the joints on the basal half of the flagellum narrowly 
annulated with black on the apex, the apical half of the flagellum fuscous ; 
the stemmaticum and mandibular teeth black ; wings hyaline, the stigma 
and parastigma pallid, livid testaceous, the costa testaceous at the base, 
the nervures in the fore wings black, in the hinder pale ; the first abscissa 
of radius fully three-fourths of the length of the second, which is as long 
as the first transverse cubital nervure ; the third abscissa of cubitus is 
rounded and is largely bullated at the base. Female. 
Length, 7 mm. ; terebra, 7 mm. 
Pretoria. 
The legs are paler coloured than the body ; the scutellar depression 
is large and strongly striated. 
The following is a synoptical table of the species of Macrocentrus 
described above : — 
1 (2) Stigma black, the second abscissa of radius three times longer 
than the first. luteus . 
2 (1) Stigma pallid testaceous, the second abscissa at the most 
twice the length of the first. 
3 (4) The metanotum and base of abdomen for the greater part 
black. nigro-ornatus. 
4 (3) The metanotum and base of abdomen immaculate. 
5 (6) The antennae with the joints of their basal half marked with 
black. annulicornis. 
6 (5) The antennal joints not marked with black. 
