Host relationships ofIxodes arvicolaeWarburton on the Scilly Isles

Abstract
Ixodes arvicolaeWarburton was collected at 2-monthly intervals from January 1961 to August 1962 on a total of 226Apodemus sylvaticusand 264Crocidura suaveolens cassiteridumin the Scilly Isles. Twenty-one adult females (out of a total forty-two ticks) were found onApodemusand one adult female (out of a total 106 ticks) onCrocidura. No adult males were found. Ticks were collected from the hosts throughout the year, but inCrocidurathere was a suggestion of greater frequency for larvae during the summer.I. arvicolaewas also found onMus musculusin the Scilly Isles and onMicrotus agrestisin Cornwall.We wish to thank Professor D. R. Arthur of King's College, University of London, for identification of the ticks involved in this study, and Dr Alec Milne of the University of Newcastle upon Tyne for helpful criticism of the manuscript.