Xylota jakutorum Bagatshanova, 1980
Xylota coeruleiventris Zetterstedt, 1838 in Stubbs & Falk (1983).
Biology & ecology:
The larva is found in sap-filled tunnels of the bark weevil Hylobius abietis (Rotheray & Stuke, 1998). It is associated with conifer plantations, and unlike most members of the genus, can frequently be found visiting flowers, especially buttercups Ranunculus sp., in open spaces such as rides, fire-breaks and way-leaves. It is particularly abundant in areas felled 2-3 years previously, after which time the stumps become suitable for the weevil larvae.
Although there are museum specimens from Caledonian pine forest in the Highlands of Scotland going back to the end of the last century, recent records extend throughout northern and western Britain. It seems to have spread southwards into conifer plantations. It is now well-established in south-west England as far east as Hampshire, with outlying records from scattered locations as far east as the Norfolk Brecklands. Further consolidation of populations can be expected in major conifer plantations in southern and eastern England.
Status & conservation:
The frequency of occurrence has varied considerably, but with no obvious long term trend.