. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. CLASSIFICATION AND HABITS OF TICKS. 47 Subfamily RHIPICEPHALIN^. Genus RHIPICEPHALUS. The genera Rhipicephalus and Margaropus (formerly Boophilus) are structurally so similar that Neumann and Fuller consider our M. annulatus as belonging to the genus Rliipicephalus. All species of Rhipicephalus, so far as studied, including five South African forms investigated hj Lounsbury and one taken by us, drop from the host for the purpose of undergoing at least one of the molts. The three species placed under Margaropus th
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. CLASSIFICATION AND HABITS OF TICKS. 47 Subfamily RHIPICEPHALIN^. Genus RHIPICEPHALUS. The genera Rhipicephalus and Margaropus (formerly Boophilus) are structurally so similar that Neumann and Fuller consider our M. annulatus as belonging to the genus Rliipicephalus. All species of Rhipicephalus, so far as studied, including five South African forms investigated hj Lounsbury and one taken by us, drop from the host for the purpose of undergoing at least one of the molts. The three species placed under Margaropus that have been studied pass both molts upon the host. This would seem to supplement the structural differences in indicating the generic validity of Fig. 3.—Rhipicephalus sp.: Capitulum of female, ventral view. Greatly enlarged (original). BROWN DOG TICK. {Rhipicephalus sp.) Salmon and Stiles in 1901 stated that they were not acquainted with any North American species, although they called attention to the fact that R. sanguineus had been reported by Neumann from Panama, R. bursa americanus from Jamaica, and an undetermined species from Porto Rico. Banks '^ records an undetermined species from Colorado. Wliat appears to be a new species has been taken quite generally from dogs in the southern part of Texas and also at Tlahualilo, Durango, Mexico (see figs. 3 and 4 and PI. Ill, fig. 5). a The Arachnida of Colorado. Ann. N. Y. Acad. Sci., Vol. VIII, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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