198 
Annals of the Tkansvaal Museum. 
Rhogas varicarinatus , sp. n. 
Kufo-testaceous ; the basal two segments of the abdomen paler 
coloured, the flagellum of antennae, tips of mandibles and stemmaticum 
black ; wings clear hyaline, the costa and stigma pallid, the latter inf us - 
cated behind ; the first abscissa of radius three-fourths of the length of the 
second ; the second cubital cellule distinctly narrowed in front, the second 
transverse cubital nervure one-fourth shorter than the first. Metanotum 
infuscated, its keel distinct. The keel on the first abdominal segment is 
weak, on the second it is obsolete ; the first is weakly striated, the striae 
stronger towards the apex ; the apical segments are tinged with rufous 
and fuscous. Temples sharply obliquely narrowed, the occiput roundly 
incised. Male. 
Length, 4 mm. 
Pretoria. October. 
Rhogas varinervis, sp. n. 
Testaceous ; * stemmaticum, an irregularly triangular mark in the 
centre of the metanotum on the basal half, the antennae, mandibular 
teeth, and the apices of the tarsi black ; wings clear hyaline, the costa 
and stigma testaceous, the basal nervures, the base and apex of cubitus 
pale, the others darker coloured ; first abscissa of radius three-fourths of 
the length of the second ; the second cubital cellule of equal width, not 
one-fourth longer along the radius than it is along the transverse cubitals. 
Parapsidal furrows shallow. The keel on the metanotum extends shortly 
beyond the middle ; the keels on the basal two abdominal segments are 
fine, but distinct ; the segments are irregularly striated in the middle, 
the striae intertwining ; the second furrow is wider than the others and 
is more strongly crenulated ; the third is narrower and smooth on the 
apex. Male. 
Length, 8 mm. 
Pretoria. February. 
The pubescence is dense, short, and white ; it is longer on the meta- 
notum. Temples rounded, not much narrowed. 
Allied to R. melanocerus, Cam. (also from the Transvaal) ; the latter 
may be known from it by the black costa, stigma, and nervures. 
Rhogas pallidipalpis, sp. n. 
Testaceous ; the antennae, stemmaticum, and tips of mandibles black ; 
wings hyaline, the costa and stigma pale testaceous, the nervures paler ; 
the second cubital cellule of equal width, not one-fourth longer along the 
radius than it is along the transverse cubitals ; legs coloured like the 
body, the tips of tarsi slightly infuscated. The keels on the metanotum 
and the basal two abdominal segments are weak ; the furrow between 
the second and third segments is weakly crenulated ; the first and second 
segments are finely closely longitudinally striated, almost reticulated. 
Parapsidal furrows distinct on the basal half. Male. 
Length, 6 mm. 
Kranspoort (Pretoria District). December. 
Temples rounded, not much narrowed, the occiput transverse. Head 
and thorax finely closely punctured, the latter more strongly than the 
