ACANTHCLM iEMEX. PRISTOMYBMEX. 193 



leeth. The 1st joint of the pedicel is posteriorly formed into a 

 squamifonn node above with a long petiole in front, the node 

 angular, incised and acutely bidentate ; the 2nd joint subglobose 

 and rugose ; abdomen highly polished. Femora and tibiae incras- 

 sate, these and the scape of the antennae pilose. 



" 11 . Colour of the . Head subparallel at the sides, 

 posteriorly bilobed, the groove on the vertex deep ; the piligerous 

 fove/>late punctures on the front confluent, more scattered on the 

 lateral lobes, finely aciculate in the intervals, beneath posterior to 

 the articulation with the thorax, that is to say behind the occipital 

 foramen, it is transversely rugose ; cheeks longitudinally silicate, 

 antennal grooves with scattered rugosities; mandibles shining, 

 .sparsely punctured and very finely rugulose ; clypeus somewhat 

 smooth, not carinate. Thorax with sculpture as in the , no 

 pronotal spines ; metanotal spines somewhat straight but divei-- 

 gent, the area between the posterior carinae smooth and broad. 

 The 1st node of the pedicel more widely emarginate, less acutely 

 bidentate than in the ; the 2nd node coarsely rugose and 

 reticulate.'"' (Emery.) 



Length, about 3'5 ; 11 4mm. 



Hob. Recorded so far only from Ceylon. 



Genus PRISTOMYRMEX. 



Mvrmica, pt., Smith, Cat. vi (1858), p. 120. 



Pristomyrmex, Mayr, Verh. zool.-bot. Ges. Wien, xvi (I860), p. 903. 



Type, P. pungens, Mayr, from Malacca. 



Range. Indo-Malayan region. 



Head more or less rounded, very convex in front ; mandibles 

 not particularly broad at apex, the masticatory margin bidentate 

 at apex, crenulate above the two teeth ; clypeus extending back 

 between the base of the antenna, the basal portion porrect, obscurely 

 crenulate anteriorly, with a median and two lateral, posteriorly 

 converging, small carinae ; antennas 11-jointed, scape elongate, 

 curved before the apex ; club of the flagellum formed of the apical 

 three joints which together are about equal to or a little longer 

 than the basal seven .joints of the flagellum ; antennal carinse long, 

 widely divergent posteriorly ; antennal hollow large ; frontal area 

 and ocelli absent ; eyes rounded, rather small, placed midway on 

 the sides of the head. Thorax broad and flat anteriorly, strongly 

 constricted posteriorly, the pronotum with lateral spines on the 

 anterior angles, pro-mesonotal suture obsolete, the nieso-metanotal 

 suture marked by a transverse carina ; basal portion of metauotum 

 very narrow and compressed, its posterior lateral angles furnished 

 with a short erect acute spine, from which a vertical carina runs 

 clown bordering each side of the apical face of the metanotum. 

 which between the two carinae is concave ; legs comparatively stout 

 and long. Pedicel: the 1st node shortly petiolate in front, its 

 anterior face slightly concave, above a little longer than broad, 



YOL. II. O 



