Johnson, W.G. 1898 Notes on the external characters of the San Jose scale, cherry scale and Putnam's scale.. Canadian Entomologist 30: 82-83.
Notes: Description of gross characters permitting recognition.
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Johnson, W.G. 1898 Notes on the external characters of the San Jose scale, cherry scale and Putnam's scale.. Canadian Entomologist 30: 82-83.
Notes: Description of gross characters permitting recognition.
Download PDF