Leioproctus macalpinei, or Leioproctus (Euryglossidia) macalpinei, 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 macalpinei honours Australian entomologist David Kendray McAlpine.
Description The female body length is 8 mm, male body length 7.5 mm. Integumental colouration is mainly black. The hair is white to brown.
Distribution and habitat The species occurs in eastern New South Wales. The type locality is 4 km north-east of Doyles Creek in the upper Hunter Valley.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Acacia buxifolia.
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