Halictus tumulorum is a Palearctic species of sweat bee.Edward Saunders 1896, The Hymenoptera Aculeata of the British Isles London. pdf us.archive Full text with illustrations]
Females are often pollinators of Cypripedium calceolus.
Distribution The species is native to the British Isles.
References
External links Images representing Halictus tumulorum