Life history of a Japanese arboreal pseudoscorpion, Haplochernes boncicus KARSCH

Abstract

An investigation was carried out on the life history and environmental factors of Haplochernes boncicus at Mt. Takao, Tokyo, from 1975 to 1977. This species is found mostly under the bark of aged trees of Cryptomeria japonica, Chamaecyparis obtusa and Pinus densiflora. The span of life is more than four years, one year each for protonymphal, deutonymphal and tritonymphal stages, and the forth one year or more is for adult stage. When molting, the pseudoscorpion constructs a nest, but on breeding season, usually from June to August; the female makes a kind of nest called "brood -bed" instead of making a nest . The number of eggs which one female incubates is 12-13 on average. は