Varshney, R.K. 1977 Taxonomic studies on lac insects of India.. Oriental Insects. Supplement. 5(1976): 1-97.
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Notes: Taxonomic characters of female, classification, nomenclature and distribution are discussed. Keys to subfamilies and genera and a check-list of world species are provided, reporting 8 genera (Kerria, Metatachardia, Tachardiella, Austrotachardiella, Austrotachardia, Tachardina, Afrotachardina and Paratachardina) and 71 species. New species are Kerria brancheata, K. chamberlini, K. nepalensis and Paratachardina mithila. Paratachardina silvestrii and Kerria sindica have been redescribed. Subspecies, lectotypes, and paralectotypes have been designated.