A PROPOS DU GENRE PHOLEOIXODES, PARASITE DES CARNIVORES EN SUISSE. - A study was conducted on the geographical distribution of 3 species of ticks in the subgenus Pholeoixodes, and their hosts. The material examined was from A. Aeschlimann s collection deposited in the Zoological Museum in Lausanne, and from the Rabies Center in Berne. P. hexagonus [Ixodes hexagonus] is spread throughout the country up to 1380 m. It was collected from 15 animal species, especially from foxes (Vulpes vulpes) and Mustelidae. Domestic animals such as dogs and cats were also found infested. P. canisuga [I. canisuga] is widespread on the Swiss Plateau and in the Jura up to 900 m. It was mainly collected from foxes and badgers (Meles meles). P. rugicollis [I. rugicollis] seems to be rare in Switzerland, where it was recorded only 3 times, twice on a stone marten (Martes foina) and once on a cat. A monospecific infestation was observed in respectively 58% and 87% of the infested foxes and Mustelidae. I. hexagonus and I. ricinus were found simultaneously on the same host on 18% of the foxes.