Couplet 140

140a:  Antennal insertions concealed from above by lateral expansion of frons; three basal ventrites connate, fourth and fifth movable; fore coxal cavity closed by mesad extension of posterior portion of the hypomeron; fore coxal process not expanded laterally at apex to
close fore coxal cavity; antenna usually with 11 antennomeres (rarely with 9 or 10 antennomeres)

Tenebrionidae   p. 436

140b:  Without this combination of characters