Here's one to test your knowledge of entomological history...
In 1969 a schoolboy collected a series of Scotch Argus from Ranoch Moor in Argyll. (School boys were less enlightened back then, preferring to collect butterflies than stab each other!)
Anyway, years later, one of these specimens was identified not as a Scotch Argus, but as another species altogether. The most tantalising evidence to date that a colony of which species of butterfly may to this day lurk undiscovered in a discrete colony in some remote Scottish glen..?

Felix.