Brachyhesma hypoxantha, or Brachyhesma (Brachyhesma) hypoxantha, is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1934 by Australian entomologist Tarlton Rayment.
Body length of females is 4 mm. Colouration is black and yellow.
The species occurs in southern Australia. The type locality is Rottnest Island in Western Australia. Other published localities include Meningie, Purnong and North Beach in South Australia.
The adults are flying mellivores. Flowering plants visited by the bees include Leptospermum and Melaleuca species.