Observations on hybridization of three species of North American Dermacentor ticks.
D000818:Animals; D001096:Arachnid Vectors; D002875:Chromosomes; D003433:Crosses, Genetic; D004463:Ecology; D005260:Female; D006168:Guinea Pigs; D006824:Hybridization, Genetic; D007814:Larva; D008297:Male; D008540:Meiosis; D010063:Ovum; D011817:Rabbits; D012098:Reproduction; D012756:Sheep; D013737:Testis / Q000166:cytology; D013987:Ticks / Q000166:cytology