. Brigham Young University science bulletin. Biology -- Periodicals. Biological Slries, V'ol. 15, No. 1 Ticks 141 supports Morel's opinion. The only report of this species as ovatiis was given by Kishida (1930a), but he also reported ja))onensis on the same page. Asanuma and Sekikawa (1952, 1953) reported and described larval and nyniphal ticks parasitic on rodents, giving them temporarv numbers such as Ixodes sp. 6 or Ixodes sp. 52, because the immature stages had not been properly associated with adult fonns. Later Asanuma (1957) showed that these numbered ticks, Ixodes sp. 6 and Ixodes sp.
. Brigham Young University science bulletin. Biology -- Periodicals. Biological Slries, V'ol. 15, No. 1 Ticks 141 supports Morel's opinion. The only report of this species as ovatiis was given by Kishida (1930a), but he also reported ja))onensis on the same page. Asanuma and Sekikawa (1952, 1953) reported and described larval and nyniphal ticks parasitic on rodents, giving them temporarv numbers such as Ixodes sp. 6 or Ixodes sp. 52, because the immature stages had not been properly associated with adult fonns. Later Asanuma (1957) showed that these numbered ticks, Ixodes sp. 6 and Ixodes sp. 52, were larval and nvmphal forms of Ixodes japonensis (= /. ovatus) respectively. Ono (1962a, 1962b. 1966) reported immature ticks from rodents in Hokkaido and gave them the numerical designations used by Asanuma and Sekikawa. DiAGXOSIS: The dorsal aspect of the male of this species is similar to /. nipponensis and /. perstdcatus, but from a ventral view it may be easilv distin- guished from those two species in that coxae II and III are lacking spurs, and the posterior halves are covered with milky white, membra- nous, eavelike elevations ( = carinatus Kishida, 1930), and consequentlv the posterior margins are smoothly convex; coxa I has a short, blunt internal spur; the spiracular plate is elongate, the L/W ratio is more than (approximately ); the dentition of the hvpostome occurs on the apical half, the posterior end is on the same level as the suture between palpal articles II and III. In the female, the basis capituli has well- defined cornua and round porous areas; coxa I has a short, blunt internal spur; on coxa II, the spur is absent and the posterior margin is convex with the elevation similar to that of the male. DlSTRIBlTIOX .\ND HoSTS; Morel ( 1963) states that this species occurs in oriental regions, including China, Formosa, Bunna, Nepal, Sikkim, and Japan, and that hosts of the adults arc large mammals. .'Kccording to Asanuma (1965a), adults are found on
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