386 



FOBMIOmX. 



. Metanotum with vertical or obliquely 



sloped teeth or spines. 

 3 . fvode of pedicel with two long spines 

 on upper lateral angles and two short 

 obtuse teeth between them ........ 



b 3 . Node of the pedicel quadridentate or 

 quadrispinous, the spines typically 

 subequal ........................ 



c 3 . Node of pedicel trispinous. 



'. Antennal carinse distinctly diver- 

 gent posteriorly .............. 



not divergent 



P.jerdoni, p. -409. 



[p. 409. 

 P. punctillata, 



P. ihrinax, p. 410. 



b 4 . Antennal carinse not divergent [p. 411. 



posteriorly .................... P. fi-anenfeldi, 



e. Pronotum and mesonotum unarmed ; meta- 



notum with a spine on each side. 

 a 2 . Metanotal spines broad, triangular, 



pointing backwards. 



a n . Head and thorax punctured, not striate. P. clypeaia, p. 411. 

 6 3 . Head and thorax striate .......... P. rastrata, p. 412. 



6 2 . Metanotal spines vertical, very small . . P. halidayi, p. 413. 

 B. Thorax wholly unarmed ; pedicel with four 



subequal spines or teeth .................. P. rastellata, p. 414. 



451. Polyrhachis bihamata, Drury (Formica), III. Exot. Im. ii 

 (1773), p. 73, pi. 38, figs. 7 & 8; Ford, Jour. Bomb. N. H. Soc. 

 viii (1893), p. 21, $. 



$ . Eufous brown, the head, apex of the femora, the tibiae and 

 tarsi, and apices of the thoracic and pedicel spines black, the apical 

 half of the abdomen more or less fuscous, the whole insect 

 covered with a fine sericeous pile mixed with scattered erect hairs ; 



Fig. \'2b.Polyrhachis\bihamata, 



pron(f al spines pointing obliquely forward and bent outwards and 

 backwards; mesonotal spines erect, their points directed backwards. 

 JSode of pedicel columnar ; above, it rises into two long spines, 

 parallel for a part of their length from base, then turned outwards 

 and downwards. 



Length, g 10-12 mm. 



ffab. Lower Burma, Pegu Toma (Allan) ; Tenasserim (Eiwi- 

 ftMt), extending into the Malay Peninsula, Sumatra, Borneo, Java. 



