Callohesma euxantha is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1912 by British entomologist Robert Cyril Layton Perkins.
The type locality is Darwin, Northern Territory. It has also been recorded from Queensland and South Australia.
The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus species.