Diomus scapularis is a species of beetle of the family Coccinellidae. It is found in southern Australia.
Description Adults reach a length of about . They are variable in colour, mostly with the entire body brown with a yellowish head, and the elytra with a yellowish marking with a black posterior border. Other specimens have reddish brown to almost black elytra, with the pattern hardly visible. The dorsal surface is covered by silvery pubescence, forming distinct patterns.
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