Leioproctus crispus, or Leioproctus (Protomorpha) crispus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by entomologist Michael Batley in 2013.
Etymology The specific epithet crispus (Latin: "curly") refers to the facial hair of the female.
Description Male body length is about 6.8 mm, head width 2.1 mm; female body length 7.5 mm, head width 2.3 mm. Integumental colouration is mainly black and brown; the hair is white to brown.
Distribution and habitat The species occurs in inland eastern Australia. The type locality is 24 km south-west of Charleville, Queensland.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eremophila gilesii, Petalostylis labicheoides and Stemodia glabella.
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