Leioproctus conospermi, or Leioproctus (Leioproctus) conospermi, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Terry Houston in 1989.
Etymology The specific epithet conospermi refers to the generic name of the forage plants.
Description The male holotype body length is 7.0 mm, female paratype 7.2 mm. Integumental colouration is mainly glossy black; the hair is white and brown.
Distribution and habitat The species occurs in south-west Western Australia from near Dongara to 150 km east of Esperance. The type locality is Mount Ragged in the Cape Arid National Park.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Conospermum distichum.
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