Leioproctus nigrifrons, or Leioproctus (Andrenopsis) nigrifrons, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by American entomologist Charles Duncan Michener in 1965.
Etymology The specific epithet nigrifrons is an anatomical reference to the lack of yellow markings on the face of the male.
Description Male body length 7 mm, forewing length almost 5 mm. Integumental colouration mainly black, hair white to pale yellow.
Distribution and habitat The species occurs in eastern Australia. The type locality is Sunnybank, Queensland.
Behaviour The adults are flying mellivores.
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