Deathwatch beetles

Coleoptera, Anobiidae [Xestobium rufovillosum (De G.), deathwatch beetle"]... 

PowdeV -Post Beetles. Powder-post, false powder-post, and deathwatch beetles are three common predators of relatively dry wood. Although they progress at a much slower rate than termites, they are capable of serious and often devastating damage to wooden objects. Powder-post beetles Lyc-tidae) fill their chambers with a very fine powder that is similar in consistency to talcum powder. They attack hardwoods. 

Deathwatch Beetles, Deathwatch beetles Xestobium rufovillosum) fill their galleries with small pellets. They are one of the most important insects degrading decorative arts. Deathwatch beetles infest both hardwood and softwood and are widely distributed geographically. They are 1.1-8 mm long and have a characteristic bell-shaped pronotum concealing the head. The last three segments of the antennae are lengthened and broadened. 

The deathwatch beetle is peculiar because of the clicking sound it makes as it bangs its head against the surface it is standing on. Females often will return a click when they are stimulated by the sound of tapping on a wood surface with a fingernail or pencil. 

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