Chauliognathus tricolor. This species is highly variable showing great range in size (beginning around 6mm up to 16mm), colour of elytra (though always entirely dark), and the markings on the pronotum.
Early February 2010
Peter Murrell Reserve, Blackmans Bay
The occurrence of variable dark markings on the pronotum is more commonly a Tasmanian trait.
C. tricolor males often have noticeably wide heads, being as wide as their pronotum. Though, this does not occur in some.
Early November 2015
Knocklofty Reserve, Hobart, nipaluna
.
Mid January 2018
Knocklofty Reserve, Hobart, nipaluna