. Entomology for medical officers. Insect pests; Insects as carriers of disease. ORDER ACARINA: THE TICKS 277 outer side angulated or produced into a spur. Neumann considers eighteen species to be valid, and they are found in all parts of the world, most of the domestic mammals being included among their victims. Rkipicepkalus,' (Fig. 121) (/o/\/r = wickerwork basket; Ke0aX)7 = head). A hexagonal basis capituli distinguishes the species of this and the two following genera. The stigmata are comma-shaped or subtriangular, and the usual anal groove is present. Neumann tabulates twenty-thre
. Entomology for medical officers. Insect pests; Insects as carriers of disease. ORDER ACARINA: THE TICKS 277 outer side angulated or produced into a spur. Neumann considers eighteen species to be valid, and they are found in all parts of the world, most of the domestic mammals being included among their victims. Rkipicepkalus,' (Fig. 121) (/o/\/r = wickerwork basket; Ke0aX)7 = head). A hexagonal basis capituli distinguishes the species of this and the two following genera. The stigmata are comma-shaped or subtriangular, and the usual anal groove is present. Neumann tabulates twenty-three species, chiefly African, but also found in South Europe, the Oriental and the Neotropical regions, their hosts being usually mammals, but occasionally birds. Rhipicephalus sanguineus is a common parasite of domestic animals and has a distri- bution coextensive with the genus. Rhipicephalus Fig. 122.—Larva of ffffimajj/ij/saiHs. Neumann, characterised by the enormous spurs of the coxae of the fourth pair of legs, is according to Neumann identical with Nuttall and Warburton's Rhipicentor. Boophilus, Curtice (/3oy? = ox; 0£\ei'i' = to love). Differs from Rhipicephalus in the absence of an anal groove, the absence of festoons, and the circular or broadly oval stigmata. Neumann is content with one species, B. annulatus, which he splits into six subspecies. B. annulatus is one of the commonest and most widely distributed ticks of cattle and other domestic animals, and is notorious as the principal carrier of the piroplasma of bovine red-water fever. The larva of Boophilus sticks to one host in all its transformations into the adult stage. Margaropus, Karsch {fxapyapo? = a pearl-oyster; -wov^ = foot). Differs from Boophilus only in having the coxse of the first pair of legs not bifid, and in the form of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of th
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