. Cottony maple scale (Pulvinaria innumerabilis Rathvon.). Scale insects; Pulvinaria; Agricultural pests. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sanders, J. G; United States. Bureau of Entomology; United States. Dept. of Agriculture. Washington, D. C. : U. S. Dept. of Agriculture, Bureau of Entomology

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