96 bulletin: museum of comparative zoology. 



depending from its midventral line. Gaster small, narrow and straight in 

 front, its antero ventral surface with a broad mass of spongiform material. 

 Legs long and slender. Wings with small pterostigma and almost no veins. 



Opaque; mandibles and gaster shining; the gaster longitudinally rugose 

 and reticulate at the base. Remainder of body densely and finely punctate, 

 rugulose, the posterior lobes of the head regularly and more coarsely, the 

 appendages more finely punctate. 



Hairs pale yellow; very long, sparse, erect, slender, and pointed, quite as 

 long and conspicuous on the legs as on the body; antennal scapes with short 

 curved, subappressed, pointed hairs, not arranged in a regular row. Head, 

 clypeus, and thorax also with numerous short, appressed, simple hairs, repre- 

 senting a long, dilute pubescence. 



Ferruginous brown; mandibles, antennae, legs, and base and tip of gaster 

 paler and more yellowish. Wings yellowish hyaline with dark brown ptero- 

 stigma. 



Described from a single specimen taken by Mr. G. E. Bryant on 

 Mt. Matang, West Sarawak and sent me by Mr. Horace Donisthorpe. 



In size, in the general shape of the body and its extraordinary 

 pilosity, this species is most closely related to S. doriae Emery, de- 

 scribed from a worker specimen taken in Amboina. This form, how- 

 ever, has more slender and cylindrical mandibles, so that the Bornean 

 specimen can hardly be the cospecific female. 



*124. Rhopalothrix borneensis, sp. nov. 



Female (dealated). Length, 3.5 mm. 



Resembling Rh. procera Emery, but smaller and the emarginations of the 

 sides of the head at the eyes and antennal insertions deeper and more sinuous 

 and the border just behind the ej'es forming a rounded, rather flattened lobe. 

 The clypeus is distinctly longer, its median portion being prolonged further 

 posteriorly. Thorax decidedly narrower than the head, the pronotum later- 

 ally compressed, deeply and angularly excised behind. Mesonotum flattened 

 above, grooved in the middle, but not carinate anteriorly. Scutellum and 

 epinotum very small, the former gibbous, overhanging the latter, which has a 

 pair of acute, flattened teeth as long as broad at their bases. Petiolar node 

 subrectangular when seen from above, as long as broad; feebly longitudinally 

 impressed in the middle. Postpetiole 2h times as broad as the petiole, much 

 broader than long, with broadly concave anterior and broadly convex posterior 

 border, the dorsal surface with a feeble median sulcus in front and a large 

 round impression behind. Gaster with a faint median sulcus. 



Opaque; densely and finely punctate-rugulose; gaster and postpetiole 

 evenly punctate; antennal scrobes and mesopleurae shining. 



