Diomus carbine is a species of beetle of the family Coccinellidae. It is found in Australia (northern Queensland).

Description Adults reach a length of about . The frons, antennae, legs, anterior angles of the pronotum and abdomen are yellowish or orange, while most of the pronotum, elytra and venter are black. The dorsal surface is shiny and covered by silvery pubescence.

Etymology The species name is derived from its type locality, Mount Carbine in Queensland.

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