. Sanitary entomology; the entomology of disease, hygiene and sanitation. h occurs on deer in Europe. The immature stages of thistick engorge very rapidly, becoming replete in from 1V> to 24 hours. The Cattle Tick, Boophilus annulatus (Say) Stiles and Hassall(Margaropus) (plate XXVII) and Varieties of This Species.—This isprobably the most important tick in relation to live stock. B. annulatus THE BIOLOGIES AND HABITS OF TICKS 435 proper occurs in southern United States and parts of Mexico whilevarieties of this species are present in tropical America, Africa, Australia,and other parts of t
. Sanitary entomology; the entomology of disease, hygiene and sanitation. h occurs on deer in Europe. The immature stages of thistick engorge very rapidly, becoming replete in from 1V> to 24 hours. The Cattle Tick, Boophilus annulatus (Say) Stiles and Hassall(Margaropus) (plate XXVII) and Varieties of This Species.—This isprobably the most important tick in relation to live stock. B. annulatus THE BIOLOGIES AND HABITS OF TICKS 435 proper occurs in southern United States and parts of Mexico whilevarieties of this species are present in tropical America, Africa, Australia,and other parts of the world. It is not only a species which produces heavylosses on account of its occurrence in tremendous numbers, but it is espe-cially important on account of being the intermediate host of the piro-plasma which produces Texas or splenetic fever in cattle. Our form is very restricted in host relations. It can complete develop-ment only on cattle, horses, mules, and deer, rarely on a few smaller ani-mals. This habit has ffrcatlv facilitated eradication. The molts are.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbenefic, bookyear1921
