Douglas, J.W. 1888b Notes on some British and exotic Coccidae (No. 11).. Entomologist's Monthly Magazine 25: 124-125.
Notes: Pseudococcus ulmi n. sp.
Douglas, J.W. 1888b Notes on some British and exotic Coccidae (No. 11).. Entomologist's Monthly Magazine 25: 124-125.
Notes: Pseudococcus ulmi n. sp.