A Redescription of Taenia tenuicollis Rudolphi, 1819, and its Larva, Cysticercus talpae Rudolphi, 1819

This is the first report of Taenia tenuicollis Rudolphi, 1819, and its larva, Cysticercus talpae Rudolphi, 1819, from North America. In the process of identification of the specimens described below, it became evident that no adequate figures of this species had been published, that this specific name had been given by recent authors to more than one species of Cestode, and that several characters of value in specific differentiation had not been described. The description given here is based entirely upon specimens from Mustela vison collected by Dr R. G. Law of the Experimental Fur Farm, Kirkfield, Ontario. Details published by Thienemann (1906) and others on the European specimens of this species are given in the accompanying comparative table.