Euhesma balladonia, or Euhesma (Euhesma) balladonia, 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 balladonia refers to the type locality.
Description Body length of the female is 5.5 mm, wing length 4.0 mm; body length of the male 5.0 mm, wing length 4.0 mm. Colouration is black and shades of brown.
Distribution and habitat The species occurs in southern Western Australia. The type locality is 35 km north-west by west from Balladonia Roadhouse.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eremophila species.
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