. Economic entomology. Beneficial insects; Insect pests; Thysanura. Ceratoneon attenuatum on leaves of sloe Section of g-all on sloe leaf. Nos. Phytoptus pruni (Volvulifex pruni, AmerL; Ceplialoneon pruni, Bremi; Bursifex pruni, Amer.). — %, Leaves of plum tree bearing galls of ditto ; 9. Sketch thereof; 10, Magnified section of gall of ditto, showing in- terior filled with hairs and no mites. These are galls like purses, made by Phytopti on the under side of the leaves of the plum tree; there soon appears on the upper side little purses or club-shaped galls of the size of a hemp seed, on the
. Economic entomology. Beneficial insects; Insect pests; Thysanura. Ceratoneon attenuatum on leaves of sloe Section of g-all on sloe leaf. Nos. Phytoptus pruni (Volvulifex pruni, AmerL; Ceplialoneon pruni, Bremi; Bursifex pruni, Amer.). — %, Leaves of plum tree bearing galls of ditto ; 9. Sketch thereof; 10, Magnified section of gall of ditto, showing in- terior filled with hairs and no mites. These are galls like purses, made by Phytopti on the under side of the leaves of the plum tree; there soon appears on the upper side little purses or club-shaped galls of the size of a hemp seed, on the outside of which grow Phyllerium and Erineum-like white hairs. The top of the gall is red in the beginning; later it becomes chestnut brown. This Acarocecidium is usually found on the second or third leaf of the twig. Dr. Amerling (" Ges. Aufsatze," p. 159) noticed these galls in Bohemia, but took the gall mites found in them for larvae of a mite, which he named Bursifex pruni. (See also '' Dr. Thomas, 1. c. zi, Bd., 1869, p. 330, No. ;). 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 Murray, Andrew, 1812-1878. [London] Chapman and Hall
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