Trichocolletes simus is a species of bee in the family Colletidae and the subfamily Colletinae. It is endemic to Australia. It was described in 2012 by Australian entomologists Michael Batley and Terry Houston.
Etymology The specific epithet simus (Latin: 'flat-nosed' or 'snub-nosed') is an anatomical reference.
Description The body length is about 11–12 mm. The eyes are not hairy. Colouration is mainly black and red-brown to orange-brown, with white metasomal bands, and with orange hair.
Distribution and habitat The species occurs in the Geraldton Sandplains bioregion of Western Australia. The type locality is Eneabba.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Daviesia species.
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