. Natural history. Zoology. 546 ARACHNIDA—ORDERS ACARINA AND TARDIGRADA. In Brazil they are said to have been introduced. This has been doubted; but it is not unlikely that a particularly troublesome species may be carried from one country to another, or introduced into districts in which it was pre- viously unknown. For a tropical country, Jamaica is remarkably free from noxious creatures ; and it is only of late years that ticks have multiplied in the island to such an extent as to make it highly unpleasant to venture among the herbage at all. This is attributed to the introduction of the mo
. Natural history. Zoology. 546 ARACHNIDA—ORDERS ACARINA AND TARDIGRADA. In Brazil they are said to have been introduced. This has been doubted; but it is not unlikely that a particularly troublesome species may be carried from one country to another, or introduced into districts in which it was pre- viously unknown. For a tropical country, Jamaica is remarkably free from noxious creatures ; and it is only of late years that ticks have multiplied in the island to such an extent as to make it highly unpleasant to venture among the herbage at all. This is attributed to the introduction of the mongoose, which was imported to destroy rats, and which is said to have carried the ticks over the whole island. The largest known ticks, which sometimes attain a length of nearly an inch, are those which are found occa- sionally upon the tortoise. Argas persicus (Fisoh.) was said by travellers to produce fatal injuries by its attacks, and to abound so much in some parts of Persia as to lead to the abandonment of whole villages ; but these reports are now believed to have been much exaggerated. The Oribaticke are dark-coloured, hard, shiny mites, found among moss and vegetable refuse; but when they are older, they feed on various small insects. The front of the body is often produced into a broad, triangular shape, and, as in many other mites, the palpi are frequently so largely developed as to resemble antennae in appearance. The PhytopUda, or gall mites, are an extremely large group, concerning which much has been written of late years. They are very long, microscopic mites, usually with only four legs visible at the anterior end Gall-Mites of the body. They produce small galls on the leaves of (Phytoptidm). various plants, sometimes conical, as on the lime trees, and sometimes rounded, as on the vine. These galls may be distinguished from insect-galls by having a small opening at the base. The (e., or itch-mites, are a family of parasites which, not content with suc
Size: 1373px × 1820px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorly, bookcentury1800, bookdecade1890, booksubjectzoology
