1. See reference cited in preceding paragraph.
2. We are in doubt about the status of Dermacentor salmoni Stiles (Bull. 62, Hygienic Lab., U.S. Pub. Helth and Marine Hospital Service, pp. 55–60, 1910), but are inclined to regard it as but a variety of D. albipictus Packard.
3. The taxonomic value of the microscopic structure of the stigmal plates in the tick genus Dermacentor;Bull.
4. The life history and bionomics of some North American ticks;Hooker;Bull.