28 FORMICID.T. 



Genus CERAPACHYS. 



Ceiapacliv.«, Smit/i, Join: Linn. -boc. ii, IHoT, p. 74, ^; lore/, Jour. 

 Bomb. y. H. Soc. xiii (1900), p. 54, ? . 



Type, C. anteniiatus, Smith, from Borneo. 



Jicoii/e. Ethiopian and Indo-Malayan regions, 

 ^ . Elongate, narrow. Head oval, occiput eniarginate, man- 

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

 obsoletely dentate ; antenual carinas 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 carina ; 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 tlie posterior than to the anterior 

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

 the pro-meso- and meso-metauotal sutures not distinct ; pronotura 

 anteriorly rounded, metauotum 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 Eossorial genus A/iteror/ijaa. 



Keij to the Species. 



a. Auteimae ll-jointed C. fossuhttus. p. 28. 



b. Aiitennoe ]2-jointed. 



a'. Head, thorax, and abdomen black. 



a'-. Apical joint of tlagellum of antennae 

 distinctly much longer than preceding- 

 three joints C. risii, p. 29. 



b'^. Apical joint of flagellum of antennte 

 equal to or only very little longer than 



preceding three joints C. su/ci?iodis, p. SO. 



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



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



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

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



5 . 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 line 

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

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

 strongly convex, the emarginatiou posteriorly deep, the posterior 



