Leioproctus platycephalus, or Leioproctus (Leioproctus) platycephalus, 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 1912.

Description Female body length is about 10 mm. Colouration is mainly black, with a ferruginous-red abdomen.

Distribution and habitat The species occurs in south-eastern Australia. Type localities include Heathmont and Adelaide.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Davievsia mimosoides and Pultenaea largiflorens, as well as Scleria, Leucopogon, Dillwynia and Eutaxia species.

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