126 bulletin: museum of comparative zoology. 



rather acute, triangular tooth on each side. Below the teeth the sides are 

 straight and rapidly converge. Gaster subglobose, with very large first seg- 

 ment, strongly and concavely truncated in front. Legs long and stout, tibiae 

 cylindrical, constricted at the base, without bristles on their flexor surfaces. 



Subopaque; mandibles finely and evenly striated, with minute, scattered 

 punctures; clypeus finely and densely punctate; upper surface of head, 

 dorsvun and sides of thorax evenly and rather finely longitudinally rugose with 

 indistinctly punctate interrugal spaces; sides of head finely and somewhat 

 irregularly rugulose-punctate; gula smooth and shining; declivity of epinotum 

 finely, transversely rugulose; petiole and gaster lustrous, very finely and 

 indistinctly punctate. 



Hairs very sparse, whitish, erect, confined to the head and tips of the gaster. 

 Pubescence whitish, indistinct on the head; longer and more abundant on the 

 pleurae; very fine and dense, producing a pruinose appearance on the thoracic 

 •dorsum, petiole, and gaster, less apparent on the legs. 



Black; palpi reddish; legs variable in color; in some specimens black 

 throughout, in others with the femora and tibiae red or reddish yellow and the 

 knees, coxae, and tarsi black. 



Eight workers ; three from Kuehing (John Hemtt " nesting at base 

 of an epiphyte between intertwining roots"), one from Kuehing and 

 one from Serambu Mt. (H. W. Smith), two from Bongo Mt. (Hewitt 

 and Brooks) and one from Mt. Matang, West Sarawak (G. E. Bryant). 



I have redescribed this form in detail because it seems certain that 

 it is Smith's P. xindex, which has not been recognized up to the present 

 time. The species is evidently very close to Smith's inermis and 

 ■orsyllvs, especially to the latter, but both of these forms were described 

 later and would therefore be only subspecies or synonyms of vindex. 



*207a. PoLYRHACHis (Hemioptica) aculeata Ma;yT subsp. cybele, 



subsp. nov. 



Worker. Length 6-6.5 mm. 



Differing from the typical form in its somewhat larger size, broader head, and 

 decidedly larger and higher petiole, with its two spines a little shorter and the 

 transverse margin between them more arcuate and sharper. The eyes are a 

 little larger and distinctly less truncated laterally and less conical and more 

 hemispherical when seen from the front. The erect, pale hairs on the body 

 are distinctly less abundant than in the typical aculeata and the legs are en- 

 tirely black. 



Described from four specimens from Kuehing (John Hewitt). 

 Type—M. C. Z. 9,076. 



