Title: Cattle ticks (Ixodoidea) of the United States
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Identifier: cattleticksixodo00salm (find matches)
Year: 1902 (1900s)
Authors: Salmon, D. E; Stiles, Charles Wardell, 1867-1941
Subjects: Ixodidae; Ticks
Publisher: Washington : G. P. O.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library
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408 BUREAU OF ANIMAL INDUSTRY. The Spinose Ear Tick (Ornithodoros Megnini)? (Figures 65-67, 82-108.) Specific diagnosis.—Ornithodoros: Adult.—Body phial-shaped; sHghtly attenu- ated anteriorly, broadest at legs II, slightly constricted near legs IV, broadly rounded posteriorly; color brown to violet or black. On the surface, symmetrical depressions, one arciform, longitudinal, from each side of the projection corre- sponding to the capitulum; lateral and slightly anterior of this, an infundibuliform depression; in back, along the lateral border, a longitudinal groove of variable length, sometimes interrupted; a median groove occupying the greater length of the posterior half. Ventral surface: Preanal groove absent, replaced by a first postanal groove at a tangent to the anal slit, straight and joining the coxal groove; the true postanal groove near posterior border; a broad anal groove terminating at this postanal groove. Subcoxal and coxal folds broad, well marked, the latter not passing coxae II, and the coxal groove passing between coxae I and II, extending backward to the second post- anal groove and disappearing on the sides near the posterior angle of the body. Stigmata circular, 250 jii in diameter, stigmal pore semilunar. Anal valve broader than long (150 to 200 ju by 200 to 250 ju), each lip provided with short hairs. Eyes absent. Tegument slightly rough (shagreened), forming an irregular mosaic, strewn with numerous fine, short hairs. Reticulate fossettes occupy the ventral and dorsal depressions; others scattered here and there. On the ventral surface between the two postanal grooves, extremely small and hard spines. Capitulum very small and short; 150 ju from base of palpi to extremity of hypostome. Maxillae slender, 490 m long, digit 75 m, stalk slightly and insensibly swollen proximally. Internal apophysis of digit thick, provided with four teeth, two terminal nearly perpendicular to each other, and two intermediate, smaller; external apophysis with superior tooth slightly salient, inferior tooth large, bent backward; median tooth well developed. Hypostome blade-shaped, broad at the base, rounded at the extremity, unarmed.^ Palpi thick, 300 ju long (90 ju, 85 //, 65 ju, 60 JU, from first to fourth article), with articles relatively broad and short, the second
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Fig. 81.—Two sense organs on tarsus I of embryo of Argas miniatus. Greatly enlarged. Original. ^Synonymy and Bibliography. 1883: Argas Megnini Duges, 1883, pp. 196,197.—Megnin, 1885, pp. 466, 472-475, pi. XXI, figs. 1-8.—Neumann, 1888, p. 96.—Idem, 1892a, p. 101.—Idem, 1892b, p. 105.—Railliet, 1893, p. 718.—Dolly, 1894, p. 980. (See also Neumann, 1896, p. 42, as syn. of Ornithodoros Megnini.') 1893: Argas americana Packard" of Townsend, 1893, pp. 50-52. 1895: Rhynchoprium spinosum Marx, 1895, p. 199, pi. ii, figs. 1-li.—Osborn, 1896, pp. 255, 256, pi. Ill, figs. 1-li. (See also Neumann, 1896, p. 42, and Stiles & Hassall, 1891, p. 1, as syn. of Ornithodoros Megnini.') 1896: Ornithodoros Megnini (Duges) Neumann, 1896, pp. 42-44, figs. 36 a-b.—Ward, 1900a, p. 199, fig. 3.—Stiles & Hassall, 1901, pp. 1, 2.—Salmon & Stiles, 1901, pp. 408-414, figs. 65-67, 82-108. ^ Megnin describes and figures teeth in five transverse rows, of which the first on each half comprises only one tooth, and the last four; none of Neumann's or our preparations corresponded to this description.
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