Key to Madagascar Probolomyrmex

This worker key is based on: [[Media:Hita Garcia, F. & Fisher, B.L. 2014. Taxonomic revision of the cryptic ant genus Probolomyrmex in Madagascar.pdf|Hita Garcia, F. & Fisher, B.L. 2014. Taxonomic revision of the cryptic ant genus Probolomyrmex Mayr (Hymenoptera, Formicidae, Proceratiinae) in Madagascar. Dtsch. Entomol. Z. 61, 65–76.]]

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 * Probolomyrmex
 * Ants of Madagascar

1

 * Petiole relatively longer, lower, and less arched, in profile (without ventral process) around 1.3 to 1.5 times longer than high (LPNeI 127–150), and in dorsal view around 1.4 to 1.6 times longer than broad (DPeI 63–69) (Fig. 1A) . . . . . Probolomyrmex tani


 * Petiole shorter, higher and stronger arched, in profile (without ventral process) between 1.0 to 1.2 times longer than high (LPNeI 103–116); in dorsal view petiole around 1.2 to 1.3 times longer than broad (DPeI 76–86) (Fig. 1B, C) . . . . . 2

2
return to couplet #1
 * Head shorter, in full-face view around 1.4 to 1.5 times longer than broad (CI 67–70); antennal scapes longer (SI 99–102); mesosoma with weak but distinct metanotal groove; surface sculpture much stronger developed throughout whole body; body colour usually darker than above, usually dark, reddish brown (Fig. 2A, B) . . . . . Probolomyrmex zahamena


 * Head longer, in full-face view around 1.5 to 1.6 times longer than broad (CI 62–65); antennal scapes shorter (SI 91–94); mesosomal outline straight without any groove; surface sculpture much weaker developed throughout whole body; body colour light orange brown (Fig. 2C, D) . . . . . Probolomyrmex curculiformis