Mesosternum between mesocoxae concave to flat anteriorly, not elevated posteriorly to more than low umbo ......... top, most spp.
Mesocoxae separated by distinctly convex to prominently raised mesosternal process, sometimes porrect ...... bottom, includes spp. such as
A. marginata, lucicola & oblivia [These were placed in the genus
Pachystethus in much of the older American literature and
Callistethus was used in combination with
marginata in
(4)]