Leioproctus megachalcoides, or Leioproctus (Leioproctus) megachalcoides, 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 megachalcoides refers to the superficial resemblance of the species to L. megachalceus (syn. L. fulvus).

Description The female holotype body length is 17 mm, wing length 11 mm. Integumental colouration is mainly a strong blue-green; the hair is white through brown to black.

Distribution and habitat The species occurs in Western Australia. The type locality is Mullewa, near Geraldton.

Behaviour The adults are flying mellivores.

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