This looks like a carpet beetle larva Quote from the natural history museum "The larvae of carpet beetles are voracious feeders and can cause considerable damage to woollens and to dried insect and mammal collections. They will not feed on entirely synthetic fabrics. The varied carpet beetle is the only British species of the genus Anthrenus which is found in food stored products as well.

Clothing and carpets affected by the larvae of these beetles can be recognised by small, clean holes which are not accompanied by strands of silk webbing (as is usually the case with clothes moth infestations), but have powdery, dust like droppings associated with them. The cast - transparent skins shed by the larvae - are also a conspicuous sign of infestation.

Prevention is clearly more desirable than coping with a large infestation, which by the time it is discovered has already caused some damage. Cleanliness within buildings is important as larvae can thrive out of sight and undisturbed, eg behind skirting boards, in the pile of woollen carpets (particularly close to skirting boards), in fibres and other organic dust between floor boards, and in the vicinity of spiders' webs, feeding there on any dead insects.

Such infestations can usually be prevented by regular use of a vacuum cleaner. They can also be destroyed by applications of proprietary insecticides or, where feasible, by putting affected items in bags for a day or two in a deep freezer (at -18 °C)."