Upon rearing under natural conditions and at 25°C with a long (LD-16:8) photoperiod, the nymphs of Pholcus crypticolens developed into adults in 45-85 days. Upon rearing at 25°C with a short (LD-10:14) photoperiod, however, they required 90-175 days for development. This remarkable developmental delay under a short photoperiod resulted from prolongation of the last instar.
