248 P. CAMERON. HYMENOPTERA. 



strongly punctured; the lower part is depressed, strongiy, irregularly obliquely striated, the 

 lower part and the. sternum finely, closely punctured; the striae at the apex form reticulations. 

 Metapleurae coarsely reticulated, the base with a strongly crenulated dépression. Basai slope 

 of i s t abdominal segment smooth, the rest closely reticulated, except in the centre at the 

 apex, where it is closely transversely striated. 



3. Cenocoelius albopilosellus, sp. n. 



Loreritz River, September. Bivak Island, November. Alkmaar, November. 



Ferruginous, the flagellum of antennae, mandibles, abdomen and hind tarsi, as well as 

 the ovipositor, black, the wings dark fuscous, with an oblique irregular hyaline cloud in the 

 i st cubital cellule and a smaller squarish one below the base of the 2nd abscissa of the cubitus, 

 the nervures and stigma black. Head, pro- and mesothorax densely covered with white pubescence, 

 the metathorax much more densely covered with longer white hair, the metapleurae more 

 densely than the metanotum. çf and Q. 



Length 9 mm. ; ovipositor 7 mm. 



The antennal scape and the hind tibiae may be entirely black. Head smooth, the face 

 closely punctured; the frontal dépression shallow, longer than wide, of equal width, margined 

 by a stout keel; there is a stout, Iongish keel between the antennae; the ocelli are placed 

 immediately above the frontal dépression; they are in a curve, the central placed only slightly 

 in front of the others ; they are separated from the eyes by about double the distance they 

 are from each other. Occiput broadly roundly incised, sharply margined. Pronotum with a 

 double transverse stout keel before the middle, the apex stoutly, closely longitudinally striated. 

 Mesonotum distinctly trilobate, the middle lobe raised ; a keel runs down its centre from the 

 apex, then curves roundly on either side to the base, then curves backwards along the longer, 

 outer side of the mesonotum, which is closely, distinctly punctured and has a shallow longi- 

 tudinal dépression down the outer side. Scutellum smooth, narrowed towards the apex; the 

 base and sides with a stoutly crenulated furrow. Post-scutellum margined by a curved keel. 

 Metanotum at the base -^widely depressed, stoutly crenulated in the middle, the crenulated 

 part wider than the smooth latéral, the rest stoutly irregularly reticulated. Propleurae strongly 

 punctured, the punctures clearly separated, the lower part of the central dépression stoutly 

 striated. Mesopleurae smooth, the top at the base strongly punctured. Metapleurae closely 

 strongly punctured, the puncturation almost hidden by the dense pubescence. Abdomen 

 smooth, not quite so long as the head and thorax united, the basai half of the i st segment 

 stoutly keeled on either side of the middle; the i st segment becomes gradually widened 

 towards the apex and is as long as the following two united. The transverse basai and the 

 récurrent nervures are interstitial; the 2nd cubital cellule is narrowed in front. The mesosternal 

 furrow is crenulated, the furrow bordering the apex of the mesopleurae is wider and crenulated. 



Allied to C. cephalotus, Smith from Celebes; it may be known from that speciesthus: 



Antennae with a white ring, the metathorax black, the hind femora black, their tibiae and 

 tarsi ferruginous ; the occiput transverse ....... cephalotus Sm. 



Antennae not ringed, the metanotum not black, the hind femora ferruginous, the tibiae and 

 tarsi black, the occiput incised, margined albopilosellus. 



