Leioproctus brochus, or Leioproctus (Euryglossidia) brochus, 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 brochus (Latin: "projecting") is an anatomical reference to the rectangular tooth on the male clypeus.
Description The holotype male body length is about 5.1 mm, female body length about 5.1 mm. Integumental colouration is mainly black, with the metasoma brown. The hair is mostly white.
Distribution and habitat The species occurs in south-west Western Australia. The type locality is Lochada, some 12 km east of Morawa.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Calycopeplus paucifolius.
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