. Economic entomology. Beneficial insects; Insect pests; Thysanura. GALL MITES, 361 ivn in the woodcut. It is common in this country on the plum tree. In Bohemia Drs. Amerling and CASE Its appearance is shown in the woodcut. It is common in this. Twig of plum tree with galls of Volvulifex pruni. Leaf of plum tree with galls of VolvuHfex pmni. Kirchner thought that it only appeared there on those trees that were growing old; but there is no such restriction in this country. It is already formed in the month of May, and afterwards becomes harder PiiYTOPTUS SALicis.—11. Leaves of sallow, tree bea
. Economic entomology. Beneficial insects; Insect pests; Thysanura. GALL MITES, 361 ivn in the woodcut. It is common in this country on the plum tree. In Bohemia Drs. Amerling and CASE Its appearance is shown in the woodcut. It is common in this. Twig of plum tree with galls of Volvulifex pruni. Leaf of plum tree with galls of VolvuHfex pmni. Kirchner thought that it only appeared there on those trees that were growing old; but there is no such restriction in this country. It is already formed in the month of May, and afterwards becomes harder PiiYTOPTUS SALicis.—11. Leaves of sallow, tree bearing galls of ditto; 12. Sketch of ditto ; 13. Magnified sketch of leaves with ditto ; 14. Magnified section of gall ; 15. Magnified figure of insect. The insect in this case is exactly like those found in other galls of this kind, but is not yellowish-white, but a distinct yellowish orange colour, although still pale. The woodcut on page 337 represents the appearance of the leaves when attacked, and a magnified section of the gall itself. This is one of the galls that we have found swarming with the mites, and then there were no hairs or cottony matter growing inside, although appearances of its having 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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