Cossoninae are a reduced subfamily of Curculionidae. These xilophagus insects produce significant damage in Spain, mainly affecting old buildings. Their activity is a real problem for the preservation of the country's historical-artistic heritage. The three Cossoninae species most widespread in Spain are described for the first time as well as the conditions under which they develop. The first results on their physiology and specific characteristics are also included. Finally, the interrelationship with other xilophagus agents (fungi and insects) which are common in Spain, is analyzed.

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