Ratzeburg, J.T.C. 1870 Eichen beschädigung durch Schildläuse (Coccus). [Oak damage caused by scale insects (Coccus).]. Tharander Forstliches Jahrbuch 20: 187-194.
Notes: Coccus variolosus, C. conchatus described and illustrated.
Ratzeburg, J.T.C. 1870 Eichen beschädigung durch Schildläuse (Coccus). [Oak damage caused by scale insects (Coccus).]. Tharander Forstliches Jahrbuch 20: 187-194.
Notes: Coccus variolosus, C. conchatus described and illustrated.