Key to the species of Arearia Seyrig, 1952 (from Rousse et al. 2013)

1. Mesoscutum and propodeum smooth (A); mesosoma mostly brown with pronotum yellow (A, C); propodeal carination developed, with area superomedia and petiolaris fused (B); ovipositor 0.1× as long as metasoma (C); Madagascar ............................................................ A. paradoxa Seyrig, 1952

– Mesoscutum transversely striate (a); mesosoma mostly yellow, dorsally black (a, c); propodeal carination indistinct, overall coarsely reticulate (b); ovipositor 0.25–0.3 × as long as metasoma (c); South Africa ........................................................................ A. oxymoron Rousse & van Noort, 2013