wheeler: the ants of borneo. 63 



but not very convex; ocelli rather small. Mandibles small, but well-developed, 

 their external borders slightly sinuate towards the base, convex at the tips; 

 apical and basal borders distinct, subequal, the former with four subequal 

 teeth. Clypeus large, convex, somewhat broader than long, slightly depressed 

 or flattened posteriorly. Front truncated anteriorly, with a transverse crest 

 or carina separating it from the preocellar space and connecting the frontal 

 carinae, which are prominent, nearly straight, subparallel and as far apart 

 as they are from the lateral borders of the head. Posteriorly each carina 

 curves forward medially to the eye as a distinct ridge and terminates opposite 

 its anterior end, thus enclosing a small, shallow, elliptical scrobe about the 

 base of the antenna. Antennae 12-jointed, scape very small, about twioe 

 as long as broad, first funicular joint also very small, broader than long, sub- 

 globular; second joint longer but also broader than long, the remaining nine 

 joints cylindrical, of equal breadth, distinctly longer than broad and gradu- 

 ally increasing in length distally; terminal joint nearly as long as the two 

 preceding joints together, with tapering and somewhat pointed tip. Thorax 

 long, narrower than the head through the eyes. Pronotima well-developed, 

 truncated in front; mesonotum and scutellum somewhat flattened above, 

 the former with distinct Mayrian furrows, the latter with a peculiar blunt, 

 spatulate spine on each side, slightly curved inward at its tip. Epinotum 

 longer than broad, subrectangular from above, its base horizontal and twice 

 as long as the vertical decUvity into which it passes through an abrupt curve, 

 the sides of the declivity above and of the base coarsely and rather irregu- 

 larly marginate. Petiole with a short, stout peduncle anteriorly and a thick, 

 cuboidal node, which is a little longer than broad and slightly higher in 

 front than behind, with tnmcated anterior and posterior and feebly rounded 

 dorsal and lateral surfaces. Seen in profile its ventral margin is slightly 

 bisinuate, with a small, triangular tooth at the anterior end of the peduncle. 

 Postpetiole distinctly broader than the petiole and broader than long, from 

 above transversely elliptical, in profile slightly truncated anteriorly, convex 

 and rounded above, its ventral border unarmed, nearly straight. Gaster 

 elongate elliptical, with straight anterior border and tapering tip. Genitalia 

 completely retracted, cerci apparently absent; pygidium and hypopygium 

 short and pointed. Legs short, of the usual simple form, without the tibial 

 spines of the worker and female; spurs of the middle and hind tibiae simple, 

 blunt at the tip. larsal claws very small, strongly curved, nonpectinated. 

 Wings very short (4.5 mm.), with a well-developed discoidal cell, a single 

 cubital cell and the radial cell slightly open at the tip. The radial cell is 

 large. Pterostigma well-developed and conspicuous. 



Subopaque; mandibles opaque, longitudinally rugose and very finely 

 punctate. Head reticulate-rugose, the clypeus more coarsely and trans- 

 versely. Front behind its anterior truncation with regular longitudinal rugae 

 converging to the anterior ocellus. Antennal scrobes less distinctly longi- 

 tudinally rugose. Upper surface of mesonotum and scutellum and sides of 

 thorax sharply and regularly longitudinally rugose, with elongate, shallow 



