Ptinus exulans

A small beetle approximately 2mm long.  It feeds on dry remains of spiders and insects and lives on Eucalypt bark.  The female lays eggs in spider nests, particularly favouring the nest of the jumping spider Servaea incana.

Australian Spider Beetle, Ptinus exulans female
Mid April 2016
Marion Bay
Photos KE

References

Hickman, VV. Notes on the biology of ptinus exulans erichson (Coleoptera: Ptinidae) [online]. Journal of the Entomological Society of Australia (N.S.W.), Vol. 8, 1974: 7-14. Availability: <http://search.informit.com.au/documentSummary;dn=214842289022777;res=IELHSS>ISSN: 0071-0725. [cited 08 May 16].

Walker, K. (2007) spider beetle (Ptinus exulans) Updated on 3/31/2007 7:42:55 AM Available online: PaDIL – http://www.padil.gov.au.