Hylaeus minusculus, or Hylaeus (Prosopisteron) minusculus, 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 1913.
Description Male body length is about 4.75 mm. Integumental colouration is mainly black, with yellow markings.
Distribution and habitat The species occurs in south-eastern Australia. The type locality is Croydon, Victoria. It has also been recorded from Caloundra in south-east Queensland, as well as from Tasmania.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus species.
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