Euhesma semaphore, or Euhesma (Euhesma) semaphore, is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1992 by Australian entomologist Terry Houston.
Etymology The specific epithet semaphore is an anatomical reference to the flag-like apices of the male antennae.
Description Body length of females is 5.8 mm, that of males 5 mm. Colouration is mainly black, brown and cream.
Distribution and habitat The species occurs in south-west Western Australia. The type locality is 10.5 km south of Eneabba.
Behaviour The adults are solitary flying mellivores. Flowering plants visited by the bees include Pileanthus filifolius.
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