During recent years the tick, Ixodes californicus Banks, has attained considerable prominence as a pest of man, pets and livestock in British Columbia coastlands. This progression from a parasite of relatively little importance to one of major economic significance has been brought about not only by the gradual spread of human settlement into the habitat of the tick, but also by a resulting marked increase in the population of the pest. The present economic status of this tick, as observed by officers of the Dominion Entomological Laboratory at Kamloops during the past eight years, is presented herewith.