Key to Odontomachus  species in or possible in MS and AL (Deyrup and Cover 2004) Workers and queens
1    Hairs on first tergite of gaster extremely fine and dense, spaces between hairs less than 1/3 as wide as length of hairs
...brunneus (Patton)
  Hairs on first tergite of gaster sparse, spaces between hairs at least 1/2 as wide as length of hairs
...2
2(1)        

Posterior face of petiole with conspicuous transverse striae

...ruginodis M.R. Smith
  Posterior face of petiole without striae, smooth (found in south-central peninsular FL)
....relictus Deyrup and Cover
Key to Males
1           Each ocellus at least as wide as space between lateral ocelli and eye
...2
  Ocelli much smaller than space between lateral ocelli and eye
...ruginodis M.R. Smith
2(1)     Head and body pale orange, antennae brown
...brunneus (Patton)
  Head and body brown, antennae yellowish
....relictus Deyrup and Cover
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