Leioproctus rubiginosus, or Leioproctus (Euryglossidia) rubiginosus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Austrian entomologist Karl Wilhelm von Dalla Torre in 1896.

Distribution and habitat The species occurs in Western Australia. The type locality is Swan River.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Grevillea didymobotrya, as well as Hakea species.

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