ENTOMOLOGY 809 
planatus Neumann (R. planus Neumann), R. duttoni Neumann, R. dux Donitz 
(R. schwetzi Larrousse), R. evertsi Neumann (with var. mimeticus Doénitz = albi- 
geniculatus Warburton), R. longus Neumann (R. falcatus Neumann), R. sangui- 
neus (Latreille) (with var. pwnctatissimus Gerstaecker), R. simpsoni Nuttall, 
R. simus C. L. Koch (with var. lunulatus Neumann and var. shipleyi Neumann), 
R. sulcatus Neumann, R. supertritus Neumann (R. coriaceus Nuttall and War- 
burton), R. deltoideus Neumann, R. neavei Warburton, and R. tricuspis Donitz. 
Boophilus decoloratus (C. L. Koch) 
Rhipicephalus decoloratus C. L. Koch, 1844, Arch. f. Naturgesch., X, 1, p. 239 ( 9; South Africa). 
C. Fuller, 1899, Queensland Agric. Jl., IV, pp. 389-394, fig. 3. 
Rhipicephalus annulatus var. decoloratus Neumann, 1901, Mém. Soc. Zool. France, XIV, p. 2 
Caro), 
Boophilus decoloratus Stiles and Hassall, 1901, Cire. 34, Bur. An. Industry, U. 8. Dept. Agric., p. 3. 
Salmon and Stiles, 1902, 17th Ann. Rept. Bur. An. Industry, U. 8. Dept. Agric. (1900), p. 433 
(# Q), figs. 152, 152c, 154d, and 155. Donitz, 1910, Denkschr. Med.-Naturw. Ges. Jena, 
XVI, p. 459( 7 ¢). Nuttall, 1916, Bull. Ent. Res., VI, 4, pp. 333 and 345, figs. 35-36 (7 @ ). 
Margaropus annulatus decoloratus Neumann, 1911, ‘Das Tierreich, Lief. 26, Acarina, Ixodidae,’ 
p. 48 (¢@ 2). 
Margaropus annulatus var. decoloratus C. W. Howard, 1908, Ann. Transvaal Mus., I, 2, p. 107, 
Pl. VI, figs. a-o ( 9, nymph and larva). 
BELGIan Conco.— Near Irumu, two females, off cattle, May 27, 1927 
(R. P. Strong). Luvungi, one female, off cattle, January 30, 1927. 
This is a widely distributed species in tropical and South Africa. There 
are many records from the Belgian Congo (J. Schwetz, 1927, Rev. Zool. Afric., 
XV, 1, p. 91), where it appears to be the most common cattle tick. Schwetz 
also lists two records of ‘“‘Margaropus annulatus” for cattle in the Belgian 
Congo, after specimens in the Congo Museum identified by Neumann and 
Gedoelst. If critically examined, these specimens, as well as those recorded 
by Newstead, Dutton and Todd (1907, Ann. Trop. Med. Paras., I, p. 100), 
will certainly prove to be B. decoloratus and not the North American B. an- 
nulatus (Say). The same remark applies to Newstead, Dutton and Todd’s 
record of the var. calcaratus. 
B. decoloratus is a tick of great economic significance. In Africa, it trans- 
mits several important diseases of domestic animals: redwater or Texas fever, 
due to Babesia bigemina (Smith and Kilborne), in cattle; gall-sickness, caused 
by Anaplasma marginale Theiler, in cattle; and spirochaetosis of cattle, sheep, 
and horses, due to T'reponema theileri (Laveran). 
Boophilus decoloratus is the only species of the genus found in the Belgian 
Congo. It has not yet been reported from Liberia. 
79 
Dermacentor rhinocerinus (Denny) 
Ixodes rhinocerinus H. Denny, 1843, Ann. Mag. Nat. Hist., XII, p. 313, Pl. XVII, fig. 3 (@; off 
Rhinoceros bicornis, South Africa). 
Dermacentor rhinocerinus Dénitz, 1910, Denkschr. Med.-Naturw. Ges. Jena, XVI, p. 483, Pl. XV, 
fig. 8 and Pl. XVII, fig. 14(¢% 9). 
Dermacentor rhinocerotis Gerstaecker, 1873, in v. d. Decken’s ‘ Reisen in Ost-Afrika, III, 2, Glieder- 
thiere,’ p. 466 (co @). Neumann, 1897, Mém. Soc. Zool. France, X, p. 370, figs. 25-26 (¢ ¢); 
