. Economic entomology. Beneficial insects; Insect pests; Thysanura. Tyroglyphus malus, side view. Copied from Riley's figure. Ditto, under side. Copied from ditto. A North American species, said to have been useful in some places (Georgia) in clearing away the mussel-shell Bark louse {Mytilaspis pomicoi'ticis of American authors) from the bark of apple trees. From the figure it appears to be narrower and more elongate than any of our species. There is no doubt, however, as to the genus to which it belongs j the smooth body, trans- verse line dividing it, the tarsal , &c., all sufficie
. Economic entomology. Beneficial insects; Insect pests; Thysanura. Tyroglyphus malus, side view. Copied from Riley's figure. Ditto, under side. Copied from ditto. A North American species, said to have been useful in some places (Georgia) in clearing away the mussel-shell Bark louse {Mytilaspis pomicoi'ticis of American authors) from the bark of apple trees. From the figure it appears to be narrower and more elongate than any of our species. There is no doubt, however, as to the genus to which it belongs j the smooth body, trans- verse line dividing it, the tarsal , &c., all sufficiently indicate it to be either a Tyroglyphus, or a Rhizoglyphus. Mr. Riley's, beautiful figure is not on a sufficiently large scale to allow us to- make out which. Tyroglyphus translucens (Acaras translucens, Nietner; Enemies of the coffee tree, 1861). It appears that other mites with similar beneficial tendencies are found in other parts of the world. M. Nietner mentions one under the name Acarus translucens, as preying on the cocci that infest the coffee plants in Ceylon, and his notice would seem to- indicate that this is most probably its proper place. He says it is a very minute whitish translucent mite, that is mixed up with the scale insects, and no doubt injures them. On examining old full- grown scale insects, the shells were often found to be filled, not with eggs, but with a white flakey substance, among which the above mentioned mite moved about. s 2. 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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