394 FORMICIDjE. 



464. Polyrhachis fortis, Emery, Rev. Suisse Zool. \ (1893), p. 228, pi. viii, 



fig. 5, g; Forel, Jour. Bomb. N. H. Soc. ix (1895), p. 456, $. 



tv . Black ; abdomen ferruginous, opaque, densely rugose- 

 punctate, not pubescent ; bead ovate, clypeus convex, anteriorly 

 in the middle obtusely truncate ; thorax massive, not margined, 

 with four spines, the metanotal spines strong and thick, elongate, 

 sub-erect ; node of pedicel with arcuate acute spines. Length 

 5'7 mm. ; width of head 1-4, of thorax 1 mm. ; length of proiiotal 

 spiues 0-6, of metanotal spines 1 mm. ; distance between the 

 apices of the nodal spines 2 mm. 



" Upper Burma, one specimen." (Emery.) 



Unknown to me, but apparently very similar to P. armata, var. 

 defensus, Smith. 



465. Polyrhachis hauxwelli, sp. nov. 



$ . Black ; head and thorax finely punctured, the punctures 

 rather larger and coarser on the latter ; abdomen finely, minutely 

 rugulose, opaque ; pubescence almost wanting, confined to a few 

 short erect hairs on the front of the head and the apical segments 

 of the abdomen. Head oval, clypeus not very convex, sublobed, 



with the anterior margin 

 rounded, and a faint medial 

 vertical carina ; antennal 

 carinse far apart, not diver- 

 gent. Thorax seen from the 

 side moderately arched, very 

 rounded and convex above ; 

 pro-mesonotal suture indi- 

 cated, meso-metanotal suture 

 completely obsolete ; pro- 

 Fig. 1 SS.Polyrftac/tis liauxwelli, . notal spines very short, acute, 



planted low down on the 



anterior lateral angles of the pronotum ; metanotal spines much 

 longer, suberect, sloping backwards and with the extreme apex 

 bent laterally outwards : legs stout, the tibiae with a row of short 

 spines beneath. Node of pedicel low, biconvex, much more 

 strongly convex posteriorly than in front, armed at the upper 

 lateral angles with two thick, rather short spines which are directed 

 backwards and curved to the shape of the base of the abdomen ; 

 between the two spines on the upper margin of the node in the 

 middle are two short acute upright spines ; abdomen broadly oval. 

 LengtJi, 4-5 mm. 

 Hob. Tenasserim, the Taoo plateau, 4000 feet (HauxweU). 



466. Polyrhachis simplex, Mayr, Verh. zool.-bot. Ges. Wien, xii (1862), 



p. 682, $ ; Forel, Jour. Bomb. N. H. Soc. viii (1893), pp. 26 & 

 34, $ $ . 



Polyrhachis spiniger, Mayr, Verh. zool.-bot. Ges. Wien, xxviii (1879), 

 p. 653, $ <j . 



5 . Black ; head and thorax finely punctured, granulate, abdomen 



