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This is an ooold thread, but I just found it while searching for some other stuff. I would say this is definitely H. nitidifrons confiformis . It is a very common species in Finland, and usually the first species to appear in the summer (Jaris' specimen in from May, a time when few other species are flying in Finland).

The amount of pollinosity on the subcallus varies a lot; this specimen is near the maximum amount of "shine", while at the other end some specimens of H. nitidifrons confiformis have a completely pollinose subcallus.

H. lurida is quite different in habitus; it is a small, dark, compact species, one of the smallest Hybomitras (here in Northern Europe) while H. nitidifrons is larger than most.