Podsiadlo, E. 2014 Identification characters of nymphal instars and adult female of Kermes quercus (LINNAEUS, 1758) (Hemiptera: Kermesidae). Polskie Pismo Entomologiczne 83: 259–268
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Notes: The 3rd-instar female and adult female of Kermes quercus are redescribed and illustrated. Identification characters of the 1st-instar, 2nd-instar male, 2nd-instar female, 3rd-instar female and adult female of K. quercus are discussed. A key to the identification of instars is included.