Leioproctus alleynae, or Leioproctus (Leioproctus) alleynae, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Tarlton Rayment in 1935.
Description Male body length is about 8 mm. Integumental colouration is mainly black; the abdomen is "an iridescent greenish-purple of great beauty"; the hair is golden to reddish-gold.
Distribution and habitat The species occurs in south-eastern Australia. The type locality is Croydon, Victoria.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Bursaria spinosa and Leptospermum scoparium as well as Eucalyptus species.
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