Trichocolletes marginatus is a species of bee in the family Colletidae and the subfamily Colletinae. It is endemic to Australia. It was described in 1879 by English entomologist Frederick Smith.
Description Colouration is mainly black and glossy, with reddish markings, and with white to brownish hair.
Distribution and habitat The species occurs in eastern Australia. The type locality is Dunwich, Queensland.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Jacksonia species.
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