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That part of North America west of the 100th meridian the author calls "a flea collectors' paraside," since two hundred and thirty-six species and subspecies of fleas are found there, while only fifty-five have been encountered in the East. The book is written in a readable manner, beginning with biographies of entomologists who have pioneered in the study of fleas and continuing with chapters on the medical importance of fleas, field and laboratory technics and the anatomy of fleas.
Systematic classification occupies the main portion of the book, with descriptions of each of the fleas, its range, host preference, seasonal distribution, abundance and the area where encountered. A geographic index tabulates, by states, the fleas found both in the West and in the East. A host index describes the animals and birds which harbor western fleas together with their relation to plague, tularemia and murine typhus. At the present time
Fleas of Western North America: Their Relation to the Public Health. JAMA. 1947;135(13):877. doi:10.1001/jama.1947.02890130067035