. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE GKAPE SCALE. 117 and an equally brief period of activity of the winged male, is passed under the protection of a waxy covering, closely applied to the host plant. The female is wingless throughout her life. The adult winged male appears in June. The winter is passed by the msects in a nearly full gro^vn condition. Our observations show that there is only a single brood of larvae each year. It also appears that this species does not deposit eggs, as has been thought, but that the female is viviparous. Some new
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE GKAPE SCALE. 117 and an equally brief period of activity of the winged male, is passed under the protection of a waxy covering, closely applied to the host plant. The female is wingless throughout her life. The adult winged male appears in June. The winter is passed by the msects in a nearly full gro^vn condition. Our observations show that there is only a single brood of larvae each year. It also appears that this species does not deposit eggs, as has been thought, but that the female is viviparous. Some newly born larvae (fig. 26) were placed on a grape cane in order to ascertain the length of the active stage. The crawling "lice" were kept under occasional observa- tion and at the end of 24 hours all were still moving, but after 48 hours all lice had settled down and had already begun the excretion of the white waxy covering. The scale formed over the young msect is whitish in color and appears to have two rmgs on its dorsal surface. The edge of the scale is closely cemented to the bark of the twig. Many larvae were examined to ascertam how fully the lobes were developed. When one day old, well-developed median lobes were found to be present. DESCRIPTION.' Scale of female (PL XVIII, fig. 2).—Yellowash- brown, slightly lighter than the bark of the "vine, diameter to mm., circular and comparatively flat, exuviae bright yellow, subcentral. Scale of male (PI. XVIII, fig. 2).—Elongate, length to mm., wddth mm., exuviae to one side, slightly darker and more convex than female scale. Adult female (PI. XVIII, fig. 3).—From 1 to mm. in length, oval. Anal plate mm. broad at base by mm. long. Median lobes prominent, more or less parallel, slightly diverging at tip, notched on each margin, with inner notch fairly prominent and slightly elevated; lateral lobes wanting or rudimentary, as is the case with ancylus; two distinct lateral incis
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