134 bulletin: museum of comparative zoology. 



Hairs yellow, erect; present only on the venter, tip of gaster, mandibles, 

 and anterior border of the clypeus. Pubescence yellow, very short, sparse, 

 and appressed, distinct on the sides of the head, on the legs and gaster. 



Brownish yellow; mandibles reddish, with dark brown teeth; scapes, 

 except their tips, a median line on the clypeus, the upper surface of the head 

 and sides of the front, a large spot on the pronotum, the mesonotum, epinotum, 

 petiole, and basal half of first gastric segment, brown; epinotal and petiolar 

 spines, tarsi, and constricted bases of the tibiae somewhat darker. 



Described from two specimens taken by Prof. Harrison W. Smith 

 on Matang Mt., near Kuching. Typc.— M. C. Z. 9,075. 



I can find no description of this beautiful and striking species. 



*228. PoLYRHACHis (Myrmhopla) personata, sp. nov. 



Worker. Length nearly 5 mm. 



Head oval, a little longer than broad, slightly narrowed in front and behind, 

 with rounded sides, convex above in the region of the frontal carinae, the lower 

 surface in profile convex in the middle, owing to a peculiar condition of the 

 occipital margin, which descends on each side of the narrowed gula as a promi- 

 nent ridge or fold and extends all the way to the anterior corner of the head, 

 with a blunt angle about half way between the neck and the mandible. The 

 ant therefore has the appearance of wearing a mask, the border of which stands 

 off on the sides and below from the neck. Eyes moderately large and convex, 

 broadly elliptical, with impressed orbits, at the middle of the sides of the head. 

 Mandibles feebly convex, 5-toothed. Clypeus moderately convex, subcarinate 

 behind, its border forming a short lobe, straight in the middle and rounded on 

 each side. Frontal area obsolete. Frontal carinae approximated, strongly 

 sinuate and bluntly angular in the middle, a little further apart behind than 

 in front. Antennae long, the scapes extending about -J their length beyond 

 the occipital border. Thorax subcylindrical, narrower than the head, about 

 twice as long as broad, slightly broader through the pronotum than elsewhere; 

 pronotum, excluding the neck, as long as broad, rounded and rather convex 

 above, anteriorly with a pair of straight, slender, acute spines, directed out- 

 ward, upward, and slightly forward. Promesonotal suture distinct and slightly 

 impressed; mesoepinotal suture obsolete. Mesonotum broader than long, 

 transversely rounded, its dorsal outline straight in profile. Epinotum short, 

 the base much shorter than the straight, abrupt declivity, armed with two 

 slender, acute spines about half again as long as those of the pronotum, di- 

 rected outward, backward, and upward, their tips very feebly recurved. 

 Petiole stout, with convex anterior and posterior surfaces, bearing above a 

 pair of long, stout, curved, acute spines. These are much longer and stouter 

 than those on the epinotum and form a semicircle, clasping the base of the 

 gaster. The median dorsal border of the petiole between their bases bears 

 two small acute teeth. Gaster subglobose, as broad as long, slightly flattened, 



