Chionaspis biclavis, Chionaspis aspidistrae and Chionaspis salicis [Willow scale]

Plate 21, "Monograph of the Coccidae of the British Isles", by Robert Newstead (Ray Society, 1900-1902). Figures 1-8 Chionaspis biclavis, views of the insect at natural size on a branch of tea plant, and details of adult females. Figures 9-10 Chionaspis aspidistrae, views of normal and parasitised female. Figures 11-13 Chionaspis salicis, view and details of adult females. Natural size and at various magnifications. Signed "R.Newstead ad nat del." The facing page is a corrected [in pencil] proof version of captions, "Explanation of Plate XXI".