Andrena microstigma EVERSMANN 1852; Andrena quadricincta EVERSMANN 1852; Melitta meridionalis HEDICKE 1933
At the time of year when many bee populations are declining, M. tricincta appears to be increasing, although it is generally only to be encountered around the inconspicuous flowers of red bartsia (Odontites vernus). In such situations it can be locally abundant and, as with other Melitta species, the males are usually more in evidence than the females.
In the British Isles, the species is apparently confined to southern England, South Wales (Glamorgan), and the Channel Isles (Alderney). However, its sole pollen source, red bartsia, is distributed throughout lowland Britain as far as the northern coast of Scotland. The plant is also found in the Western and Northern Isles, and is widely distributed in Ireland (Perring & Walters, 1962). The European distribution extends from Fennoscandia (where it is very rare) to Spain, and east to Romania or beyond.