Hylaeus cyanurus, or Hylaeus (Euprosopoides) cyanurus, is a species of bee in the family Colletidae and subfamily Hylaeinae. It is endemic to Australia. It was described by English entomologist William Kirby in 1802.

Distribution and habitat The species occurs in north-eastern Australia. Type localities include Cooktown, Queensland. It has also been recorded from Jardine River and Mackay in Queensland, and Nourlangie Creek in the Northern Territory.

Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Pogostemon and Tristaniopsis species.

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