Rhyzobius bilineatus is a species of beetle of the family Coccinellidae. It is found in Australia (Queensland).
Description Adults reach a length of about . They have an elongate oval, flattened body. The dorsal surface is red brown, with the lateral margins of the pronotum and a stripe on the disc of each elytron golden brown. The ventral surface is mostly dark brown, with the legs golden brown. There is moderately long and pubescence on the dorsum.
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