Tenthredo moniliata KLUG , 1817

Liston, A. D., Knight, G. T., Heibo, E., Bland, K. P., Barstad, Trond Elling, Blank, S. M., Boeve, J. - L., Fiedler, K., Grearson, K. J., Halstead, A., Jacobs, H. - J., Jansen, E., Lonnve, O., Prous, M., Robinson, J. & Taeger, A., 2012, On Scottish sawflies, with results of the 14 International Sawfly Workshop, in the southern Highlands, 2010 (Hymenoptera, Symphyta), Beiträge Zur Entomologie = Contributions to Entomology 62, pp. 1-68 : 55

Tenthredo moniliata KLUG, 1817

Orkney, Hoy , Quoyberstane, HY 4612 (111), 1 ♀, 22.vi.2009, leg. Bland, det. Liston.

Malleny Woods, (artificial?) pond, 1 ♀, 12.vi.2010, leg. Liston.

As noted by Benson (1952), Tenthredo moniliata is in the British Isles exclusively associated with Menyanthes trifoliata L. [see also above under T. ignobilis ]. In the Highlands T. moniliata is widespread, although not previously recorded in Orkney. Around Edinburgh and in other areas of the British mainland south of the Highlands it has become restricted to a very few sites (except in Wales, where it is local but widespread, as in Ireland). Its sole host has suffered numerous local extinctions, as for example is well documented in the Edinburgh area: compare Martin (1934) with BSBI (2010). The colour form with mainly black femora decribed by Cameron (1878) as T. lachlaniana falls within our present concept of variability in T. moniliata . The status of T. moniliata as regionally endangered in lowland Britain is similar to its status in the lowlands of Central Europe, but in Austria and Germany the situation is complicated by the existence of populations (or perhaps as yet undistinguished sibling species) on Origanum and Pulsatilla .