Leioproctus irroratus, or Leioproctus (Leioproctus) irroratus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by English entomologist Frederick Smith in 1853.

Distribution and habitat The species occurs in eastern mainland Australia. Type localities include Melbourne.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Lomatia, Macadamia and Eucalyptus species.

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