On March 7th, 1931, the writer collected numerous ticks (six species) from an adult tapir, Tapirella, bairdii (Gill), soon after it had been killed near Summit, Canal Zone, Isthmus of Panama. By far the greater number belonged to a species somewhat resembling Amblyomma cajennense in general appearance, but showing characteristics readily separating it from that species. Two young tapirs, of the same species as the foregoing, that were examined more recently were also found to be heavily infested with this species of tick. Since this species is apparently a new one it is herewith described under the name of Amblyomma tapirellum.