Morphologie des stases preimaginales des Ixodidae s.str. d Europe occidentale. VI. Les nymphes des Ixodes s.str. - We have dealt in a earlier report the generalities of the genus Ixodes s. str. and as well the description of larvae of three species of Ixodes s. str. from occidental europe. Here we complete the study of preimaginal stages of the genus by describing the nymphs of the above three species. The key presented for the determination of nymphs can be used for all the species of Ixodes s. str. from palearctic region