Leioproctus hillieri, or Leioproctus (Goniocolletes) hillieri, 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 1914.

Description Male body length is about 8 mm. Colouration is mainly black, the abdomen glossy, with pale, cream-coloured hair.

Distribution and habitat The species occurs in arid central Australia. The type locality is Hermannsburg, Northern Territory.

Behaviour The adults are flying mellivores.

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