What's Eating Your Collection?

Adult beetle

Size: 1-2mm

Shape: Pointed oval, (abdomen) 

Colour: Brown

Antennae: Medium with a loose club

Distinguishing features: Flanges at edge of thorax - these are only visible with a microscope. 

Larvae are pests of: mould and mould spores

Damage: Larvae can occasionally damage damp paper

Adults eat: Not known

They are indicators of high local humidity. One or two specimens do not indicate a problem, large numbers indicate that the damp source needs to be investigated.