HYMEXOPTERA FROM BORNEO, 17 



Cryptin^j. 



v Mesostenoideus angulicolUs, sp. nov, 



Black, a large mark in the centre of the face, rounded 

 above, slightly narrowed below, a line on the sides, rounded, 

 narrowed above and below, clypeus, mandibles, except at the 

 apex, a line on the upper inner orbits, rounded, narrowed above 

 and below, a narrow line, interrupted in the middle, on the base 

 of the prothorax, a broad raised line in the middle of pronotum, 

 tegulae, scutellums, metanotal spines, and broad lines on the 

 apices of the abdominal segments — the 1st and last broader 

 than the others, yellow. Legs reddish fulvous, the 4 anterior 

 coxae and trochanters and the upper side of the hind coxae, 

 yellow, the rest of the hind coxae, the apex of the hind fermora 

 and the base of their tibiae, black. Antennae broadly white 

 in the middle. Wings hyaline, the stigma and nervures black, 

 9. 



Length 11 mm. 



Kuching. February. 



Head, if anything, wider than the thorax ; the face some- 

 what strongly punctured, the clypeus less closely punctured 

 above, smooth below, covered with white pubesence. The part 

 between the ocelli and. the frontal depression bearing stout, 

 more or less, curved striae. Base of thorax above broadly 

 rounded ; a rounded incision between the yellow dilated part of 

 the pronotum and the black apex, which is rounded. Mesonotum 

 finely rugose, more or less striated at the base. Scutellum 

 roundly raised, longer than wide, the apex with a rounded 

 slope ; it is almost smooth ; the basal depression is large and 

 has 4 stout, slightly converging keels ; there are stout lateral 

 keels on the basal slope. On the metanotum there is a distinct 

 petiolar area, which is smooth and depressed at the base ; on the 

 apex are 3 stout irregular transverse striae ; the base on the 

 sides closely, mostly transversely reticulated ; the transverse 

 keel is stout and is roundly curved towards the base in the 

 middle ; the rest of the metanotum is strongly, widely reticulat- 

 ed, the reticulations irregular, more or less angled. The upper 



R. A. Soc, No. 48, 1907. 



n 



