Those bugs would be basic Corrodentia (booklice). They eat cellulose, and sometimes
seem to like bit of old mucilage glue, which was once used to mount prints to cardboard. They're torture to old bookbindings, and sometimes sneak behind glazing and force one to take the frame apart and clean things, but otherwise aren't the same
degree of enemy to photographers as they are to librarians. They don't eat much anyway. Carpenter ants are a completely different thing, however, if they ever get to
books or boxes left forgotten in some attic. My biggest problem of late was two old
arthritic male cats we had taken indoors until they passed away. They didn't like each
other and started spraying, and got my big flat file cabinets pretty good. Besides the
stink and the rug shampooing, some of the wood finish got messed. Fortunately, none
of their sacrilege reached any mounted prints. And yes, they both died or natural
causes, though I cannot comment on how I was tempted to ....