Published online by Cambridge University Press: 31 May 2012
The paper of Koenike (1895) on the North American water mite fauna (Abh. naturw. Ver. Brewmen 42: 167-266) and a subsequent revision (Koenike 1912, Trans. R. Canad. Inst. 9: 281-296) together listed thirty-seven species of Hydracarina. These reports were based on materials collected and transmitted to Dr. F. Koenike by the eminent Canadian geologist, Dr. J. B. Tyrrell. Seven of the thirty-seven species were reported from localities in the Rideau Lakes district and in the vicinity of Ottawa.