28 FORMIC1DJE. 



Genus CERAPACHYS. 



Cerapachy?, Smith, Jour. Linn. Soc. ii, 1857, p. 74, $; Forel, Jour. 

 Bomb. ~N. H. Soc. xiii (1900), p. 54, $ . 



Type, C. antennatus, Smith, from Borneo. 



Range. Ethiopian and Indo-Malayan regions. 

 $ . Elongate, narrow. Head ova], occiput emarginate, man- 

 dibles triangular, narrow at base, the masticatory margin broad, 

 obsoletely dentate ; antenual carinae elongate, curving round 

 the base of the antennae, but not broadened into a lamina over 

 the same ; antennal hollow very wide, bounded exteriorly by a 

 strong c?.rina ; clypeus very narrow and transverse ; antennae 

 11- or 12-jointed, stout, the basal joints of the flagellum very 

 short, the apical joint long, thickened, and pointed at apex ; eyes 

 small, lateral, placed closer to the posterior than to the anterior 

 margin of the head. Thorax rather short, slightly compressed, 

 the pro-rneso- and meso-metanotal sutures not distinct ; pronotura 

 anteriorly rounded, metanotum truncate at apex ; legs moderately- 

 long and stout, the tibiae with a single pectinate calcar at apex. 

 Pedicel one-jointed, node separate, both from the metanotum and 

 abdomen, more or less roundly cubical; abdomen elongate, the 

 basal segment not truncate anteriorly, the constriction between 

 the basal two segments deep and well-marked. 



Nothing is known about the habits of the species, but the deep 

 constriction between the basal two abdominal segments reminds one 

 of the species of the Fossorial genus Apterogyna. 



Key to the Species. 



a. Antennae 11-jointed C.fossulatus, p. 28. 



b. Antennae 12-jointed. 



'. Head, thorax, and abdomen black. 



-'. Apical joint of flagellum of antennae 

 distinctly much longer than preceding 



three joints C. risii, p. 29. 



6 2 . Apical joint of flagellum of antennae 

 equal to or only very little longer than 



preceding three joints C. sulcinodis, p. 30. 



b'. Head in part, thorax, pedicel and basal 



joint of abdomen red C. aitkeni, p. 30. 



32. Cerapachys fossulatus, Forel, Ann. Soc. Ent. Eelg. (1895), p. 48 ; 

 id. Jour. Bomb. N. H. Soc. xiii (1900), p. 331. 



$ . Deep brownish or yellowish red, the head in part and the 

 abdomen, excluding the basal segment, black. The whole insect 

 polished and shining ; the head, thorax and basal abdominal 

 segment coarsely punctured, cribrate, the rest of the abdomen 

 more finely and sparsely punctured : the whole insect covered 

 with fairly abundant, long, erect whitish hairs, and a fine 

 sericeous, rather sparse, hoary pubescence, seen only in certain 

 lights, and especially dense on the antennae and legs. Head 

 strongly convex, the emargination posteriorly deep, the posterior 



