Euhesma walkeri, or Euhesma (Euhesma) walkeri, is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1998 by Australian entomologist Elizabeth Exley.
Etymology The specific epithet walkeri honours Dr Ken Walker, collector of the species, with whom Exley "spent many hours collecting and discussing bees".
Description Body length of the female is 4.5 mm, wing length 3.0 mm. Colouration is mainly black, dark brown and yellowish.
Distribution and habitat The species occurs in southern inland Western Australia. The type locality is 40 km north of Norseman, in the Goldfields–Esperance region.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eremophila scoparia and Eucalyptus species.
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