Leioproctus nitidulus, or Leioproctus (Leioproctus) nitidulus, 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 1916.
Description Female body length is 9.5–10 mm, male is about 8.5 mm. Colouration is mainly glossy black, with white, brownish and black hair.
Distribution and habitat The species occurs in both south-western and south-eastern mainland Australia. The type locality is Yallingup, Western Australia. It has also been recorded from Gorae West in Victoria.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus and Leptospermum species.
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