Leioproctus eugeniarum, or Leioproctus (Goniocolletes) eugeniarum, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by British-American entomologist Theodore Dru Alison Cockerell in 1912.

Description Female body length is about 11 mm. Colouration is mainly glossy black, with indistinct metasomal bands.

Distribution and habitat The species occurs in Queensland. The type locality is Mackay.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eugenia species.

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