Abstract
Life history of Zelotes asiaticus (BÖSENBERG et STRAND) was estimated by means of laboratory rearing and field investigation. This species is likely to mature after 8 molts during more than a year after emergence from an egg sac. It seems that this species has a two-year life cycle as follows: Eggs are deposited by the overwintered adult females from spring to early summer; spiderlings emerge from the egg sacs in summer and develop to 2nd-5th instar by winter; juveniles which hibernate their first year develop to penultimates in summer and mature in autumn; and adults overwinter. Possibility of copulation between two populations in which the generation cycles differ from each other is discussed.
