. Cooperative economic insect report. Beneficial insects; Insect pests. VOL. 19 No. 30. 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 United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Division. Hyattsville, MD. [etc. ] Plant Protection and Quarantine Programs Animal and Plant Health Service

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Keywords: ., bookcentury1900, booksubjectbeneficialinsects, booksubjectinsect