. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. ''^fy/'^ KiG. 6.—A^pidiotus]}ernicioguf:: n, female; 6, margin of pygidium magnified. (Howard and Marlatt.) secretion of its scale. This young scale is at first white with a swell- ing in the center. If it is situated on green tissue it is apt to pro- duce a redness. In a few days the pale scale becomes nearly black, with acentral nipple surrounded by one or two depressed rings. This form is very characteristic of the species. In about twenty-tive days another brood of males appears, and in thirty days the female
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. ''^fy/'^ KiG. 6.—A^pidiotus]}ernicioguf:: n, female; 6, margin of pygidium magnified. (Howard and Marlatt.) secretion of its scale. This young scale is at first white with a swell- ing in the center. If it is situated on green tissue it is apt to pro- duce a redness. In a few days the pale scale becomes nearly black, with acentral nipple surrounded by one or two depressed rings. This form is very characteristic of the species. In about twenty-tive days another brood of males appears, and in thirty days the females become adult. At about thirty-live or forty days of age the females begin to give birth to living young. Since one of these mother scales may have been born six weeks before another, it results that there is a 24842—No. 34—02 2. 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. Bureau of Entomology. Washington : G. P. O.
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