. Entomology for medical officers. Insect pests; Insects as carriers of disease. 280 ENTOMOLOGY FOR MEDICAL OFFICERS / Body oval, distinctly narrowed anteriorly A. reflexus. I Body elliptical, blunt and hardly narrowed anteriorly = 6. Body twice as long as broad ; basis capituli narrowed posteriorly = A. cucumerinus (Peru). Body hardly longer than broad, basis capituli rectangular and well in front of coxae of first pair of legs = A. transgariepinus (South Africa). "Dorsal integument with large polygonal depressions ; tarsi with well-marked dorsal terminal protuberance, giving an appearan
. Entomology for medical officers. Insect pests; Insects as carriers of disease. 280 ENTOMOLOGY FOR MEDICAL OFFICERS / Body oval, distinctly narrowed anteriorly A. reflexus. I Body elliptical, blunt and hardly narrowed anteriorly = 6. Body twice as long as broad ; basis capituli narrowed posteriorly = A. cucumerinus (Peru). Body hardly longer than broad, basis capituli rectangular and well in front of coxae of first pair of legs = A. transgariepinus (South Africa). "Dorsal integument with large polygonal depressions ; tarsi with well-marked dorsal terminal protuberance, giving an appearance 7. ^ of a bifid tip = A. brumptii (on man in Somaliland). Dorsal integument almost smooth ; tarsi not appearing bifid = A. aqualis (German East Africa). Argas persicus (Oken); the Fowl-tick (Fig. 123). The body is flat, oval, and narrowed anteriorly; general integu-. Fio. 123.—jlr^os ^'ersicus. ment finely wrinkled, almost granulous, with numerous platelets; margins formed of quadrangular areolae; basis capituli broader than long. Found on birds, but particularly on fowls, ducks, geese, and turkeys, in all parts of the world; in Persia it is said to attack man commonly. It lives in cracks of walls, particularly of poultry-houses. It is fatal to fowls by spreading among them the specific spirillum of chicken cholera; but when it attacks a fowl in force the envenomed bites and the loss of blood alone are sufficient to cause death. In Persia its bite is feared by natives, and is said to be actually dangerous to foreigners. According to observations collected and confirmed by Nuttall, the eggs are laid in batches in the cracks where the ticks hide, and begin to hatch in about three weeks. The larva, which has three pairs of legs and an anterior capitulum,. 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 Alc
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