wheeler: the ants of borneo. 87 



straight, subparallel sides, bilobed behind, owing to the deep, angular occipital 

 incision, which is continued into a deep occipital and frontal groove all the 

 way to the frontal area. Eyes small, moderately convex, elongate elliptical 

 at the anterior third of the head. Mandibles very large and convex, with 

 very broad, straight, edentate apical and very concave basal borders. Clypeus 

 depressed on the sides and behind, convex and roof -like, but not carinate in 

 the middle in front, where it projects over the proximal ends of the apical 

 mandibular borders as a short lobe, with straight margin and indistinctly 

 dentate corners. Frontal area rather distinct, triangular. Frontal carinae 

 strongly diverging behind, each bordering a deep narrow scrobe for the antennal 

 scape, running down obliquely to the side of the head a little behind and above 

 the eye. At this point it turns sharply at an angle to form a short scrobe for 

 the base of the funiculus, running forward just above the eye and merging 

 anteriorly into an interrugal space. Antennae slender, the scapes curved and 

 flattened but not dilated at the base. Funiculi with a 3-jointed club, shorter 

 than the remainder of the funiculus; -joints 2-8 as long as broad. Thorax 

 short, less than half as broad as the head; pro- and mesonotum rather de- 

 pressed dorsally where they are covered by the posterior portion of the head; 

 pronotum without spines. Mesoepinotal constriction not very pronounced. 

 Epinotum very short, its base much shorter than the vertical declivity; the 

 spines very long, slightly curved downward, thick at the base, strongly tapering 

 at the tips, diverging outward, backward and upward, much longer than their 

 distance apart at the base. Metasternal angles small, acute, directed upward. 

 Petiole from above nearly twice as long as broad, a little broader behind than 

 in front, with concave sides and narrow node, armed with two upwardly 

 directed acute spines, the space between which is semicircular; anterior 

 surface of the node long and concave, the posterior straight and abrupt. 

 Postpetiole a little broader than the petiole and a little broader than long, 

 very convex dorsally and rounded on the sides. Gaster only about ^ as large 

 as the head, subcircular, flattened, with straight anterior border. Femora 

 thickened in the middle, tibiae somewhat clavate. 



Rather shining; mandibles smooth, with very fine, widely scattered punc- 

 tures. Clypeus smooth and shining. Head covered with umbilicate piliger- 

 ous foveolae, elongate on the gular surface, on the space between the frontal 

 carinae interspersed with strong, diverging longitudinal rugae; cheeks coarsely, 

 longitudinally rugose, space enclosed by the two limbs of the scrobes coarsely 

 reticulate-rugose; the scrobes smooth and shining, not transversely rugose. 

 Thorax coarsely and reticulately rugose; epinotal declivity between the spines 

 and the whole petiole smooth and shining; postpetiole coarsely and indis- 

 tinctly rugose above, subopaque. Gaster smooth and shining. 



Hairs pale grayish, short, erect, blunt, but not thick, sparse, covering the 

 scapes and legs including the funiculi and tarsi as well as the body, more 

 abundant on the gaster; on the antennal scapes, most numerous on the anterior 

 surface; on the legs, most numerous on the extensor surfaces. 



Deep ferruginous brown; mandibles, antennae, legs, epinotal spines, and 

 peduncle of petiole deep red; gaster and borders of mandibles blackish. 



