Detailed data on the rearing of three groups of Ixodes rubicundus ticks at different temperature and
humidity levels are presented in a series of tables and figures. The differences between the life-spans are
seen to be dependent mainly upon the temperature. The average duration of 405 days at relatively high
temperatures is extended to 1115 days at lower temperatures. The reason for the mortality rate of approximately
96% of the immature stages in all groups during the prefeeding, feeding and premoulting periods
The journals have been scanned in colour with a HP 5590 scanner; 600 dpi. Adobe Acrobat v.11 was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.