1. Wildlife Section, Center for Weed and Wildlife Management, Utsunomiya University, 350 Mine, Utsunomiya-shi, Tochigi 321-8505, Japan
2. Mahara Institute of Medical Acarology, 56-3 Aratano, Anan-shi, Tokushima 779-1510, Japan
3. Nikko Yumoto Visitor Center, National Parks Foundation Nikko Branch, Yumoto, Nikko-shi, Tochigi 321-1662, Japan
4. Department of Agriculture, Utsunomiya University, 350 Mine, Utsunomiya-shi, Tochigi 321-8505, Japan
5. United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
6. Institute of Natural and Environmental Sciences, University of Hyogo, Sawano 940, Aogaki-cho, Tanba, Hyogo 669-3842, Japan