Identifier: lifehistorybiono106hook (find matches)
Title: The life history and bionomics of some North American ticks
Year: 1912 (1910s)
Authors: Hooker, W. A. (William Anson), 1877- Bishopp, F. C. (Fred Corry), 1884-1970 Wood, H. P. (Herbert Poland), 1883-1925 Hunter, W. D. (Walter David), 1875-1925
Subjects: Ticks
Publisher: Washington, D.C. : U.S. Dept. of Agriculture, Bureau of Entomology
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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cies occurs in greatest abundance inthe humid or Austroriparian division of the Lower Austral Zone. Itis known to occur only in the southern United States and Mexico,although it has been carried from this territory upon the host.The quarantine placed upon southern cattle by the United StatesDepartment of Agriculture now prevents its introduction into theNorthern States. LIFE HISTORY. Owing to the economic importance of this species its life historyand habits are better known than those of any other tick. Studiesof its biology have been made by Curtice (1891), Morgan (1898),Newell and Dougherty (1906), Hunter and Hooker (1907), Cotton(1908), Graybill (1911), and others. The egg (Tables XXXVII-XXXIX).—During the warmer monthsoi the year oviposition commences on the second or third day afterdropping. Occasionally eggs may be deposited on the day followingdropping. During the winter months the preoviposition period is Bui. 106, Bureau of Entomology, U. S. Dept. of Agriculture. Plate VII
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The North American Cattle Tick, Margaropus annulatus. Fig. 1.—Deposi ted-out female with eggs. Fig. 2.—Unengorged larva. Fig. 3.—Engorgednymph, dorsal view. Fig. 4. Engorged nymph, ventral view. Fig.5.- Unengorged nymph(balsam mount). Fig. 6.—Fully engorged female, dorsal view. Fig. 7.- Male, ventral view.Fig. 8.—Male, dorsal view. Fig. 9.- Unengorged female, dorsal view. Fig. 10.— Unengorgedfemale, ventral view. Fig. 11.—Fully engorged female, ventral view. (Original.) THE NORTH AMERICAN CATTLE TICK. 113 greatly lengthened. In one case a tick which dropped on November20 did not begin depositing until January 25, giving a preovipositionperiod of 66 days. As a rule, however, the adults are killed by tem-peratures which are sufficiently low to retard deposition to thisextent. The following table, which is based upon ticks which

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