HYMENOPTERA FROM BORNEO. 23 



of the basal half of mesonotum, a slightly narrower one on the 

 apical three-fourths down the sides, the furrow at the base of 

 the scutellum, the metanotal area, the central furrow, its apex, 

 the centre of propleurae broadly, the mesosternum, the apex of 

 mesopleurae and the base of metapleurae, black ; the apex of 

 the petiole and the base of the dilated part broadly, infuscated ; 

 antennae black, the scape yellowish, the basal joints of fiagel- 

 lum testaceous below. Wings hyaline, iridescent, the costa, 

 stigma and nervures fuscous. 9 . 



Length 10 mm. 



Kuching. January 14th. 



Face and clypeus densely covered with silvery pubes- 

 cence as are also, but less densely, the sides of the front ; the 

 vertex is smooth, shining and sparsely haired. Below the 

 antennas is a transverse keel ; between it and the base of the 

 antennas is a longitudinal plate, rounded and narrowed in the 

 middle. Eyes large slightly diverging below, coarsely facet- 

 ted. Thorax smooth, shining, sparsely haired ; the furrow 

 at the base of scutellum, stoutly crenulated. On either side 

 of the metanotal area are six stout, clearly separated keels. 

 The base of propleurae stoutly, irregularly striated. The dilat- 

 ed apex of petiole large, longer than wide, pyriform. The 

 mandibles are testaceous, tinged with yellow-collar transverse, 

 margined at the base. Tibiae fringed with white hair ; the 

 tarsi covered with darker, shorter, stiffer hair. The apical 

 half of the metanotum has the sides transversely striated. 

 The petiole is distinctly, roundly curved and is much more 

 dilated than in pygmacus or arvcnsis ; it is longer than the 

 following 2 segments united. 



Ji 



Mellinus nigromaculatus, sp. nov. 



Eufo-testaceous, the head, the 3rd and following segments 

 of the antennae, a small irregular spot on the sides of the meso- 

 notum at the base, a larger one near the centre, the furrows at 

 the base and sides of the scutellum, the metanotal area, upper 

 part of furrow, the base of mesopleurae broadly, of the meta- 

 pleurae narrowly on lower half and the mesosternum, the 



E. A. Soc, No. 48, 1907. 



