アリマキタカラダニ（ケダニ目：タカラダニ科）の発生消長，発育所要日数，および性比

A large number of mite larvae feeding on aphids was observed between late June and early July, and between August and September in Shizuoka, Central Japan. Developmental times from egg to adult emergence at 15, 20, 25, and 30°C were 128.0, 67.5, 43.8, and 35.0 days, respectively; the lower threshold temperature and effective accumulative temperature for development were estimated as 9.3°C and 711 degree-days, respectively. The sexes were distinguishable by the presence of the amphioid sclerite that is positioned in the genital opening of the male. The sex ratio was approximately 1 : 1, and the body length of adult females was significantly larger than that of adult males.