Leioproctus maculatus, or Leioproctus (Leioproctus) maculatus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Tarlton Rayment in 1930.

Description Female body length is about 10 mm, male about 9 mm. Integumental colouration is mainly black, the abdomen red, the hair white to drab and golden.

Distribution and habitat The species occurs across southern mainland Australia. The type locality is Sandringham, Victoria.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Arctotheca, Leucopogon, Myoporum, Cassia, Eutaxia and Eucalyptus species.

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