Illustration of the Dermacentor andersoni, Dermacentor variabilis, and Dermacentor americanum
Description
A plate showing three ticks that transmit Rocky Mountain spotted fever to man-- Dermacentor andersoni, Dermacentor variabilis and Dermacentor americanum. Picture shows males on left, females on right.
Creator
Cooley, Robert Allen, 1873-1968 ; Kramis, Nicholas J., 1910-1988