Diaspis bromellae [Pineapple scale], Diaspis boisduvalii [Biosduval scale] and Diaspis calyptroides [Cactus scale]

Plate 13, "Monograph of the Coccidae of the British Isles", by Robert Newstead (Ray Society, 1900-1902). Figures 1-7 Diaspis bromellae, view of the insects on a pineapple and at various stages of development. Figures 8-10 Diaspis boisduvalii, view of the insects on a palm leaf, after potash treatment and thoracic tubercle detail. Figures 11-12 Diapsis calyptoides, view of the insects on a cactus and an adult female after potash treatment. Natural size and magnified to x20, x35, x45 and x500. Signed "R.Newstead ad nat del.", partially cropped. The facing page is a corrected [in pencil] proof version of captions, "Explanation of Plate XIII". Verso is a struck-through version of Figure 1, Diaspis bromellae. Inscribed "on imported pineapple, Chester, April 8 1897".