192 FORMICUXE. 



antennae 12- jointed, the club of the flagellum formed of the 

 apical 3 joints as in Phidole. Thorax short, robust, diminishing 

 in width posteriorly, the pronotum armed anteriorly with two 

 long acute divergent spines ; pro-mesonotal suture obsolete, ineso- 

 metanotal suture tolerably distinct ; basal portion of metanotum 

 level, rather short, the posterior lateral angles armed with two long 

 divergent spines ; legs rather short, the femora and tibia3 incvassate 

 in the middle. Pedicel : the 1st node squamiform, strongly 

 bidentate above, the 2nd rounded, broader than long, its upper 

 margin transverse but not acute ; abdomen almost circular, some- 

 what depressed and not very convex above. 



}/ . Head enormously large, articulated on the underside with 

 the thorax, so that the posterior portion of the head projects over 

 the thorax; clypeus curved in the middle anteriorly, otherwise as 

 in the ; mandibles very convex on the outside, the masticatory 

 margin above with a sharp cutting-edge, below dentate ; antennal 

 carinae strongly divergent, thick and bordering the antennal hollow, 

 which is as long as the scape and bent downwards towards the 

 eye to receive a portion of the flagellum. Antennae very short, 

 shorter than in the . Thorax short, without sutures, pronotum 

 not ai-med, metanotum armed with 2 long erect spines. Pedicel 

 and abdomen as in the , the 1st node much less strongly bidentate. 



223. Acanthomyrmex luciolae, Emery, Ann. Soc. Ent. Fr. Ixii (1893), 

 p. 245. 



" . Ferruginous testaceous, mandibles, antennae and legs 

 lighter, the margins of the mandibles and clypeus blackish shining, 

 pilose but not pubescent. Head subquadrate, the sides convex, 

 posteriorly widely emarginate, studded with piligerous fovese, thickly 

 punctured, the punctures distinct ; the antennal grooves transversely 

 rugose ; clypeus shining, anteriorly a little rugose, with two fine 

 carinae; mandibles somewhat smooth, lightly punctured, the scape 



[Fig. 70. Acanthomyrmex luciolte, . (After Emery.) 



of the antennae minutely striate. Thorax with a slight impression 

 at the meso-metanotal suture, the piligerous foveae confluent; 

 pronotal spines long, a little curved and widely divergent ; the 

 metanotal spines elongate, with their bases close together, diver- 

 gent and bent like cow's horns ; from their bases descend two 

 carinae, limiting the shining area, and produced down to the 

 insertion of the pedicel ; the metapleurae carry posteriorly obtuse 



