Pseudomyrmex peperi (Forel, 1913)
Worker diagnosis. Relatively small, HW 0.76-0.90, with elongate head (CI 0.76-0.89) and moderately elongate eyes (REL 0.45-0.50); median clypeal lobe laterally rounded or subangulate; petiole broad and posterolaterally angulate (PWI 0.63-0.75); head punctulate-corarious and matte; body light to medium brown, rarely dark brown.
Similar species. P. nigrocinctus.
Distribution. Eastern Mexico to Nicaragua.
Biology. This obligate acacia-ant has been recorded from Acacia chiapensis, A. collinsii, A. cornigera, A. gentlei, A. globulifera and A. hindsii. Colonies of P. peperi are apparently polygynous over much of its range.