Leioproctus murinus, or Leioproctus (Euryglossidia) murinus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by entomologist Michael Batley in 2025.
Etymology The specific epithet murinus (Latin: "mouse-coloured") refers to both appearance and relatively small size.
Description The female body length is 5 mm, the male 4.4 mm. Integumental colouration is mainly black, with a dark brown metasoma. The hair is white to grey and brown.
Distribution and habitat The species occurs in inland eastern Australia. The type locality is 56 km east of Cunnamulla in southern Queensland.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Parakeelya balonensis, Calotis cuneifolia, Calotis lappulacea and Rhodanthe moschata.
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