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Having trouble with this specimen. Femora very dark but some surfaces, e.g. posterior face of front femur, look a bit orangey from some angles rather than black. No definite contrasting orange/black pattern. Mix of black/white hairs on frons and arrangement of hairs/bristles on sternites appear to rule out Machimus atricapilla. Compared with specimens of M. cingulatus and measurements in Stubbs and Drake seems rather too big for either of those species anyway. From a close look at the ovipositor, best fit might be Eutolmus rufibarbis? However tergites are dark at margins rather than pale. Not from a known location either. Rough grassland between old woodland and lake on Bedfordshire Greensand, UK. Thoughts? Swept 11 August 2021.