Hylaeus littleri, or Hylaeus (Prosopisteron) littleri, also known as Littler's masked bee, is a species of bee in the family Colletidae and subfamily Hylaeinae. It is endemic to Australia. It was described by British-American entomologist Theodore Dru Alison Cockerell in 1918.
Description Male body length is 5.5 mm. Integumental colouration is mainly black, with yellow and bright ferruginous markings.
Distribution and habitat The species occurs in south-eastern Australia. The type locality is George Town, Tasmania. It has also been recorded from Mount Magnificent in the Mount Lofty Ranges of South Australia.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Banksia species.
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