151 
Habitat.—Hillsides near Adelaide, South Australia, under 
stones with ants. 
When alive the insects are extremely active and nimble; when 
at rest the antenne are carried subhorizontally diverging out- 
wards in an easy curve; the femora are placed at an angle of 40— 
50° to the body, the tibiz being adpressed to the inner upper 
margin and nearly parallel with it (not along the lower as is 
usually the case) the tarsus extending backwards in the same 
direction as the body. In this position the concavity of the inner 
side strongly resembles that of an outer ear, and suggests the 
idea of serving as an auditory organ together with the membran- 
ous plate at the apex. After death the body shrinks considerably 
and also becomes darker in color. 
The species resembles the European one considerably, but 
differs in various details, such as size, the presence of eyes, the 
curved hind tibiz, and having the spurs and spines of different 
form, &e. 
