. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. Fig. ISO.—Ixodes marxi: Female. (Original.) several small yellow marks on the brown scutum. Several species are yellowish, with irregular brownish marks. A. cajennense Fabr. (fig. 123) is one of them and is abundant in the tropics of America, extending up into Texas. A. maculatum Koch is a handsome species with rich brown and yellow markings, not unlike a Dermacentor. It has but one spine on the front coxae, while other species have two spines. One very large species, A. tuberculatum Marx, occtirs in Fl
. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. Fig. ISO.—Ixodes marxi: Female. (Original.) several small yellow marks on the brown scutum. Several species are yellowish, with irregular brownish marks. A. cajennense Fabr. (fig. 123) is one of them and is abundant in the tropics of America, extending up into Texas. A. maculatum Koch is a handsome species with rich brown and yellow markings, not unlike a Dermacentor. It has but one spine on the front coxae, while other species have two spines. One very large species, A. tuberculatum Marx, occtirs in Flor- ida on the gopher or tortoise. Some hairy species occur on the giant tortoises of the Galapagos Islands. A. dissimile Koch is quite common in the American tropics and is sometimes taken on bullfrogs. None of the species occur in the Western United States, an interesting fact of distribution. None of our spe- cies of Ainhlyoinma have as yet been associated with the dissemination of any disease, but all are likely to attack man and the domestic animals. In South Africa A. hebraeum Koch, commonly known as the "Bont tick," transmits heart water to sheep and calves, but occurs on a great variety of animals, both wild and domestic. The genus Haemaphysalis (formerly called Rhipi- stoma) is represented in our country by but three spe- cies; one, H. leporis-palustrid Pack., is very common on rabbits, especially in the South and West. The young are often found on the heads of birds that nest on the ground, but the adults of this species are rarely taken on bu-ds. H. chordeilis Pack. (fig. 126) is usually found on birds. It has been taken in Vermont on turkeys and is said to be a serious pest, the ticks sometimes being so abundant on young turkeys as to kill them. H. expositidus Koch, a European species, has been recorded from Manitoba on cattle. Verj^ possibly it was imported, but it appears to be well estab- lished. This species in Europe is often troublesome on sheep. T
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