Douglas, J.W. 1890b Notes on some British and exotic Coccidae (No. 17).. Entomologist's Monthly Magazine 26: 238-240.
Notes: Pulvinaria ribesiae discussed.
Douglas, J.W. 1890b Notes on some British and exotic Coccidae (No. 17).. Entomologist's Monthly Magazine 26: 238-240.
Notes: Pulvinaria ribesiae discussed.