Pseudomyrmex janzeni Ward, 1993
Worker diagnosis. HW 0.93-1.03; head broad (CI 0.88-0.94); median clypeal lobe laterally rounded; frontal carinae relatively well separated (FCI > 0.06); head densely punctulate and opaque, becoming weakly sublucid between ocelli and upper margin of compound eye; head venter with conspicuous suberect pubescence; head and mesosoma light orange-brown, gaster the same or slightly darker.
Distribution. Western Mexico (Jalisco, Nayarit, Sinaloa).
Biology. P. janzeni is a polygynous acacia-ant, which occupies Acacia hindsii. Additional details of the life history are given in Janzen (1973).