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Is it possible to ID this asilid.? I know they're very tricky..

Could it be Machimus rusticus? It seems to have tufts of pale hairs just above the proboscis which one source suggested was distinctive.

It is listed as vulnerable species in the UK, but it was in its classic habitat, a species rich chalk grassland reserve and it is quite common at other chalkland sites such as Stonehenge around 30km away

14.8.11 c15mm Chalk grassland, Wiltshire, UK