Leioproctus quadrimaculatus, or Leioproctus (Leioproctus) quadrimaculatus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Glynn Maynard in 2013.
Etymology The specific epithet quadrimaculatus (Latin: "four-spotted") is an anatomical reference to the patches of hair on the mesosoma.
Description Female body length is about 8 mm, male body length 7 mm. Integumental colouration is mainly black and brown. The hair is white to yellow, including four spots of yellow hair on the dorsal mesosoma.
Distribution and habitat The species occurs in the Wet Tropics of Far North Queensland. The type locality is Kuranda.
Behaviour The adults are flying mellivores.
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