Pachyprosopis flava, or Pachyprosopis (Pachyprosopula) flava, is a species of bee in the family Colletidae and subfamily Euryglossinae. It is endemic to Australia. It was described by Australian entomologist Elizabeth Exley in 1976.
Etymology The specific epithet flava (Latin: yellow) refers to colouration.
Description Female body length is about 4.0 mm, wing length 2.9 mm; male body length 4.0, wing length 2.4 mm. Integumental colouration is mainly yellow with brown markings; the hair is mostly white.
Distribution and habitat The species occurs in inland northern Australia. The type locality is Lake Moondarra, near Mount Isa in the Gulf Country of north-west Queensland. It has also been recorded from 50 km west-south-west of Wave Hill in the Northern Territory.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus brevifolia.
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