The selection of shelter place by the house cricket.

The stimuli acting upon the choice of shelter and resting place by the house cricket, Acheta domesticus (L.) were analysed. The places of preference in different types of terraria as well as the choice of tubes of different diameter and of various light conditions were investigated. Acheta domesticus avoids open and illuminated space in its choice of resting place. It prefers dark places, enclosed by walls, like a clefts or boxes. The influence of the conditions of environment configuration at the larval period of the crickets' development upon their subsequent preference as to rest place, has not been stated. Neither was this influence observed on their behavioural reactions as connected with the former. Crickets attain their ethological praeferendum of resting site owing to their innate photo- and thigmo-kinesis which are supplemented by hygrophilia and thermophilia. The influence of the group effect on the cricket's individual rate of development was confirmed.