1a.  Antennae club-shaped.
                Ballophilidae; Ballophilus australiae

1b.  Antennae tapering.
                go to 2

2a.  Cephalic plate at least 1.5 times as long as wide; up to 41 leg-pairs.
                ?Chilenophilidae; Zelanion spp.

2b.  Cephalic plate about as wide as long or slightly longer; 41 or more leg-pairs (rarely 39).
                Geophilidae; go to 3

3a.  Last sternite wider than long, normally only 2 pores visible on each last leg coxopleuron; coastal areas only.
                Tuoba laticeps

3b.  Last sternite about as wide as long, 6-10 large pores in 2 close rows on each last leg coxopleuron; gardens only.
                Geophilus longicornis

3c.  Last sternite as long as wide or longer, numerous pores on all surfaces of last leg coxopleuron; all natural habitats and some gardens.
                Tasmanophilus spp.