Key to Genera of Leptofoeninae

1 Eighth gastral tergum reduced, represented by short rim posterior to apical margin of seventh gastral tergum; pronotal lateral surfaces posteriorly with finely striate regions (striolate area) of integument; basitarsus twice as long as second tarsomere (Argentina to southern United States)............... Leptofoenus Smith

– Eighth gastral tergum mobile, elongate and spike-like; pronotal lateral surfaces posteriorly with smooth regions of integument but distinctly no striolate region; basitarsus as long as or slightly shorter than second tarsomere (northeastern Australia, Papua New Guinea) .............. Doddifoenus Bouček