24 ronjJiciD.i:. 



b'. Claws not pectinate. [p. 72. 



«••. Pronotum with teeth or spines .... Odoxtoi'ONKKa, 

 I*. Pronotum without teeth or spines. 

 a'. Posterior marpin of clypeus notdis- [p. 73. 



tinctly detined Platythyhka, 



n'. Posterior margin of clypeus defined 

 by a suture, 

 a". Node of pedicel hispinous p(5,s- 



teriorly Diacamma, p. 75. 



b''. Node of pedicel not bispinous, some- 

 times denticulate posteriorly. 

 a'. Posterior coxa> armed with a 



spine , , . EcTATOsiMA, p. 82. 



b'. Posterior coxaj unarmed. 

 a". Episternum of mesothorax sepa- [p. 86. 



rated from sternum by a suture. Ectomomyrmex, 

 b'^. Episternum of mesotiiora.x not 

 separated from sternum. 

 a^. Posterior tibiae with only one 

 spur. 

 a'°. Club of flagellum of autenute 



not well detined Ponera, p. 88. 



b^°. Club of flagellum of antenn;e 

 distinct. 

 «". 3Iandibles armed with tive [p. 104. 



teeth Cryptoponk, 



b^\ ^Mandibles armed with two 



teeth Myopia.s, p. lO;). 



b'\ Posterior tibife Avith two spurs, 

 rt'". Middle of front margin of 



clypeus produced, truncate [p. 91. 



at apex Pseudoponera, 



J^°. Middle of front margin of 



clypeus not produced. [p. 93. 



«^^ Without eyes, blind Centromyr.mex, 



6'\ Eyes present. 

 «^-. Meso-metanotal suture ob- [p. 95. 



solete BOTHROPONERA, 



b^^. Meso - metauotal suture 



well marked, 

 a". Masticatory margin of 



mandibles very long, [p. 99. 



longerthau iunermargin. 31esoponera, 

 6". 3Iasticatory margin of 



mandibles shorter, about [p. 101. 



length of iuner margin . . Brachyponera, 



Genus SPHINCTOMYRMEX. 



Sphinctomymiex, Jlat/r, J'er/i. r.ool.-bot. Ges. Wien, xvi (186G), 

 p. 895, pi. 20, iig. 8. 



Type, S. stdli, Majr, from Brazil. 

 Ramie. Neotropical and Indo-Malayaii regions. 

 5 . Of elongate slender form ; head rectangular, slightly 



