Leioproctus macrodontus, or Leioproctus (Hadrocolletes) macrodontus, 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 1935.

Description Male body length is about 12 mm. Integumental colouration is mainly black; the hair is white, through golden and amber, to grey and black.

Distribution and habitat The species occurs in south-west Western Australia. The type locality is Cottesloe.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Hakea erinacea as well as Grevillea and Banksia species.

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