HYMENOPTERA FROM SARAWAK, 107 
the sides; the middle of the segment is depressed and striated. 
The 4th segment has a large, smooth depression on the base at 
the sides. The legs are covered with black hair, which is long- 
est on the posterior pair. The 2nd cubital cellule is slightly 
shorter than the 3rd. 
This species is closely related to the species I have, with 
some doubt identified as B. foveatus, Sm. This agrees with it in 
colouration, but is larger and more stoutly built (16 mm.) : the 
2nd cubital cellule on the top is equal in length to the 3rd; the 
apex of the petiole is not stoutly, irregularly transversely 
striated; the lateral depressions on the 2nd, 3rd and 4th segments 
are larger and deeper, the keel on the 2nd sezment is more dis- 
tinctly defined and the longitudinal striation on the abdomen 
is stronger. 
Iphiaulax mareotis, sp. nov. 
Black, the head, pro- and mesothorax and the lower half of 
the metapleure ferruginous; the anterior legs, the middle coxe, 
trochanters and femora rufous. the middle tibiz dark rufous; 
the wings dark fuscous, the stigma and nervures black; the 1st 
and 2nd abdominal segments, the greater part of the 3rd and 
the 4th and 5th broadly in the middle longitudinally rugose; 
the furrows on the 2nd, 3rd and 4th segments are crenulated ; 
the keel on the 2nd segment extends to the apex; the plate is 
longish and is stoutly longitudinally striated. &. 
Length 15 mm. 
Hab. Lingga. 
Face thickly covered with long hair ; its centre bare, smooth 
and shining; its lower sides havea yellowish tint. Front deeply 
excavated laterally ; the hinder ocelli each bordered by a deep 
curved furrow behind. Clypeus transverse in the middle above, 
its sides rounded. Metanotum thickly covered with black hair. 
The petiole is more roundly convex than usual; the sides of the 
2nd segment are not depressed at the base; the 3rd to 6th seg- 
ment have a large roundish fovea on the sides near the middle, 
the foveze becoming successively smaller. There is a faint 
curved cloud in the 1st cubital cellule at the base and a clearer, 
smaller pyriform one below the lower part of the 1st transverse 
cubital nervure ; the 2nd abscissa of the radius is slightly, but. 
distinctly, longer than the 3rd. 
R. A. Soc,, No. 39, 1903. 
