Batrisodes tianmuensis

Diagnosis
Batrisodes tianmuensis can be separated from all other Chinese congeners by the following combination of characters: antennomeres XI strongly concave at the ventral margin and with an acute basal projection, smooth pronotum lacking median antebasal foveae and inner and outer basolateral foveae, mesofemur with a small ventral spine at middle, mesotibia with a blunt apical protuberance, and aedeagus with an elongate, broad dorsal lobe suddenly pointed at the apex.

Distribution
China

Biology
Ant host: Ectomomyrmex The new species was collected from an ant colony nesting under a stone.