106 rOBMICIDjE. 



b' . Abdomen viewed in profile more or 

 le.-s convex above, not triangular 

 beneath. 

 a'-. INIetanotinn unarmed. 



d\ "Without eyes or ocelli, blind . . LiOMvnMEX, p. 198. 



IP. I\ves present Vot.i-knhovi.a, p. 213. 



i^. Metanotum armed. 



a^. Lateral marg-in.s of head and 



thorax denticulate and .spiny . . Cataulacus, p. 120. 

 h^. Lateral margins of head and 

 thorax not dentate or spiny. 

 rt*. Pedicel attached todorsal sur- 

 face of abdomen CREMASTO(;A.STF,R,p.l24. 



?;'. Pedicel attached to middle of 

 front or to ventral surface of 

 abdomen. 

 rt\ Pronotnm armed with spines 

 or teeth. 

 a^. Thorax raised anteriorly, 

 viewed from front with 

 a sharp truncate trans- 

 verse mar<>in above .... Lophomykmkx, p. 194. 

 //'. Thorax not raised, de- 

 pressed, somewhat flat. . PRiSTOiiYRMKX, p. 193 

 h\ Pronotum not armed. 

 a^. Club of antennae formed 

 of apical 2 joints of 



flao-ellum Phidologiton, p. 160. 



¥'. Club of antennae formed 

 of apical 3 joints of 

 flagellum . 

 h'. Anteunal furrows pre- [p. 175. 



sent TETRAMoniUM, pt., 



h'. No antennal furrows. 



ii*. Clypeus bicarinate. . Myrjxecina, p. 107. 



b^. Clypeus not cariuate . Stebeomyemex, p. 218. 



b. AntemifB 10-jointed .' Solenopsis, p. 157. 



c. AntennK3 9-jointed. 



«'. Anteunal furrow lateral and deep . . Meranoplus, p. 166. 

 b\ No antenna! furrows. 



«-. Clypeus bicarinate Oligomyrmex, p. 152. 



Ir. Clypeus not carinate Cahebara, p. loO. 



(I. Anteuufe 7-iointed. Mvrmicaria, p. 117. 



e. Antennte 6-jointed Strumigenys, p. 147. 



B. Antennae 12-jointed. 



a. Posterior margin of clypeus not produced 



between bases of antenure Sima, p. 107. 



h. Posterior margin of clypeus produced 



between bases of antennas. [p. 191. 



a. I'ronotum armed with 2 spines .... Acanthojiyrhex, 

 b' . Pronotum not armed. 



a'-. Erect hairs on body trifid Triglyphothrix, p. 171. 



b'-. Erect hairs on body not trifld ; 

 simple. 

 «■'. First node of pedicel bidentate 



posteriorly Atopomyrmicx, p. 189. 



