Wingless cockroach adults are large, shiny brown with yellow stripes and margins. They are nocturnal, feeding at night and sheltering by day under trash.
Adult males and females of C. elegans are large (25-35 mm long) and shiny brown with yellow stripes and margins. The male of C. solida is fully winged, whereas the females are wingless. Nymphs are initially greyish-brown or tan, developing yellow markings when about half adult size. Both species are Australian natives.
Wingless cockroach populations reach highest densities under no tillage with stubble retained.