SIMA. 



10< 



//. First node of pedicel uot dentate 

 posteriorly. 

 rt\ Flagellum of autenute scarcely 

 thickened towards apex, with- 

 out distinct club. 

 a^. Calcaria of posterior pair 



of leg-s pectinate _ Mvrmica, p. 26-5. 



h'\ Calcaria of posterior pair of 

 leo's not pectinate, simple. 

 a''. Clvpeus bicariiiate and 



bideutate IIolcomyrmex, p. 2&U. 



¥. Clypeus not cariuate or 

 dentate. 

 a'. Metanotum unarmed or 



at most bideutate .... Messor, p. i'77._ 

 b'. Metanotum armed with [p- 269. 



2 short spines ... Aph.?3N0GASTer, 



h*. Flagellum of antennte with 

 distinct club. 



a\ Clypeus bicarinate Moxomorium, p. 199. 



i\ Ch-peus not bicarinate, occa- 

 sionally -R-ith one carina, 

 ft". Tibife with simple calcaria. 

 a~. Neuters or workers 



strong-ly dimorphous . . Piiidole, p. 220. 

 h'. Neuters or workers 

 monomorphous. 

 «■. Maxillary palpi 4- 

 jointed ; erect hairs 

 on body not clavate ; 

 antennal furrow gene- [p. ITS. 



rally present Tetramorium, pt., 



^-. 3Iaxillary palpi 5- 

 jointed ; erect hairs 

 on body clavate ; 

 no antennal furrows. . Leptothorax, p. 214. 



¥. Tibiffi without calcaria Cardiocondyla, 



[p. 287. 



Genus SIMA. 



Eciton, Jerdon (ncc Latr.), Madr. Jour. L. S. xvii (18ol), p. 111. 

 Pseudomyrma, Smith (nee Lund), Cat. vi, 1858, p. 159. 

 Tetraponera, pt., Smith, A. M. X. II. (2) ix, 1852, p. 44 

 Sima, Roger, Berl. ent. Zeit. vii (1863), p. 178, 5 . 



Type, 'S'. allahorans, Walker, from Ceylon. 



Range. Palsearctic, Ethiopian, and Indo-Malayan regions. 

 '^ . Head more or less rectangular; in profile, truncate anteriorly, 

 the clypeus and mandibles being bent vertically downwards from 

 the line of the front; mandibles linear, very little if at all broader 

 at their apical margins than at their base ; clypeus narrow, not 

 produced back between the antennal carinae, generally with more 

 or less of a posterior median projecting portion ; sides above the 

 level of the eyes straight or convex, posterior occipital angles of 

 the head rounded ; antennae 12-jointed, short, somewhat massive, 

 with a distinct thickening towards the apex of the flagellum ; 



