Leioproctus prasinus, or Leioproctus (Euryglossidia) prasinus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by entomologist Michael Batley in 2025.
Etymology The specific epithet prasinus (Latin: "leek-green") refers to colouration.
Description The female body length is 7.3 mm. Integumental colouration is mainly iridescent dark green. The hair is white to golden-brown.
Distribution and habitat The species occurs in western New South Wales. The type locality is 17 km south of Mount Hope.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Acacia johnsonii.
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