Lattke (1995) reports this species as a millipede specialist found in humid forests. In Corcovado National Park, I observed a worker with milliped prey. triangularis has been introduced in south Florida (Deyrup et al. 1989).

The Costa Rican records I have of this species are as follows:

Puntarenas: Sirena, Corcovado National Park, 8¡29'N, 83¡36'W, 5m (J. Longino). (1) Worker on log. (2) Single worker with millipede prey. (3) Workers on large tree trunk. (4) Canopy Ficus; dealate queen walking on branch.

Lattke (1995) reports a collection from La Selva Biological Station.