Leioproctus fallax, or Leioproctus (Protomorpha) fallax, 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 1921.
Description Female body length is about 9 mm. Colouration is mainly black with white, grey and red hair.
Distribution and habitat The species occurs in eastern Australia. The type locality is Bribie Island in south-eastern Queensland. It has also been recorded from Coonabarabran, Mellong Swamp and Marramarra National Park in New South Wales.
Behaviour The adults are flying mellivores.
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