Kerria lacca is a species of scale insect of the family Kerriidae. It is most well known as one of the primary species of lac insects; they are raised for the production of lac, a commercially important scarlet substance that is used for dyeing wool and silk, in cosmetics, Pharmaceutical glazes, wood finishing varnishes and polishes such as French polish, and as a traditional medicinal drug. Kerria lacca insects inhabit trees in colonies of thousands and secrete the resinous substance.