Leioproctus ibex, or Leioproctus (Leioproctus) ibex, 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 1914.
Description Male body length is 8 mm. Colouration is mainly black, with white and black hair.
Distribution and habitat The species occurs in both western and eastern Australia. Published localities include Wyalkatchem, Western Australia and Windsor, Victoria.
Behaviour The adults are flying mellivores.
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