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  Number of segments between alitrunk and gaster  (2 segments (petiole and postpetiole) are reduced or isolated between the alitrunk and the gaster)     Eye size  (Eye composed of more than one lens)     Spines on alitrunk  (Alitrunk without spines)     Number of antennal segments  (11 antennal segments)

Identity - What this specimen is (based on the available  information).
Family - Formicidae,  Subfamily - Myrmicinae,  Species - Cyphomyrmex rimosus Forel

Description: Monomorphic; total length 1.8-2.5 mm; frontal carina moderately to strongly expanded laterally (and often forward) forming distinct lobes that, in some cases, cover most or all of the cheeks in full face view; alitrunk short, stout, with a number of tubercles; gaster never tuberculate; 11 antennal segments

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Cyphomyrmex rimosus
(Alex Wild 2003)