ENTOMOLOGY 805 
Hyalomma pusillum P. Schulze 
Hyalomma pusillum P. Schulze, 1919, Sitzungsber. Ges. Naturf. Fr. Berlin, pp. 193 and 195 
(@ 9; Arabia). Chodziesner, 1924, Zool. Jahrb., Abt. Syst., XLVII, p. 560, fig. T!(¢# @ and 
nymph). 
SOUTHERN ARABIA.— Aden, many males and females, off dromedary, 
Camelus dromedarius Linnaeus, May 9, 1927 (J. Bequaert). These specimens 
were obtained in the type locality of the species. 
Only one species of Hyalomma (H. aegyptium) is known from the Belgian Congo 
and none from Liberia. Hyalomma (Cosmiomma) hippopotamense (Denny), a spe- 
cific parasite of the hippopotamus, should be looked for in both territories.! 
Rhipicephalus sanguineus (Latreille) 
Ixodes sanguineus Latreille, 1806, ‘Gen. Crust. Ins.,’ I, p. 157 (France). 
Rhipicephalus sanguineus Donitz, 1910, Denkschr. Med.-Naturw. Ges. Jena, XVI, p. 469, Pl. XVID, 
fig. 10, Pl. XVII, fig. 6 (a ¢). Neumann, 1911, ‘Das Tierreich, Lief. 26, Acarina, Ixodidae,’ 
p. 35, figs. 16-17 (#1 @). Newstead, Dutton, and Todd, 1907, Ann. Trop. Med. Paras., I, 
p. 100. Cunliffe, 1914, Parasitology, VI, pp. 372-378, figs. 1-4 (o@ 9, larva, and nymph). 
Nuttall, 1915, Parasitology, VII, p. 448 (biology); 1916, Bull. Ent. Res., VI, 4, pp. 328 and 
345, figs. 25-28 (7 @). J. Bequaert, 1926, Medical Rept. Hamilton Rice 7th Exp. Amazon, 
p. 168. Senevet, 1928, Arch. Inst. Pasteur Algérie, VI, p. 46, fig. (on p. 45) (larva). 
Liperta.— Reppo’s Town and Lenga Town, many males and females, off 
domestic dog, August 13 and 31, 1926. 
BELGIAN Coneo.— Stanleyville, off domestic dog, January 1927. 
R. sanguineus is the common dog tick, now almost of world-wide distribu- 
tion in tropical and subtropical regions. In Africa practically every dog is 
infested with it and it is found on many other animals, both wild and domestic. 
A remarkable host record is the okapi (Okapia johnstoni Sclater), based upon 
specimens obtained by Schouteden at Koteli, Itimbiri. 
As shown by Christophers, R. sanguineus is the carrier in dogs of Hepato- 
zoon canis (James), a parasite of the leucocytes, and of Babesia canis (Piana 
and Galli-Valerio), a parasite of the red blood corpuscles. Babesia canis is 
the cause of malignant jaundice of dogs, a disease widely distributed in the 
Old World. It is not quite clear yet that Hepatozoon canis is pathogenic to 
any great extent. 
Rhipicephalus appendiculatus Neumann 
Rhipicephalus appendiculatus Neumann, 1901, Mém. Soc. Zool. France, XIV, p. 270 (# @; Cape 
Colony and Southwest Africa); 1911, ‘Das Tierreich, Lief. 26, Acarina, Ixodidae,’ p. 37 (@ ¢@). 
Déonitz, 1910, Denkschr. Med.-Naturw. Ges. Jena, XVI, p. 470, Pl. XVIb, figs. 7 and 14, 
and Pl. XVII, fig. 7(#7¢@). Nuttall, 1913, Parasitology, VI, pp. 111-117 (biology); 1915, 
loc. cit., VII, p. 488; 1916, Bull. Ent. Res., VI, 4, pp. 323 and 344, figs. 18-21 (0 9). 
Rhipicephalus nitens Neumann, 1904, Arch. de Parasitologie, VIII, p. 462 (@ 9; Stellenbosch, 
Cape Province). Newstead, Dutton, and Todd, 1907, Ann. Trop. Med. Paras., I, p. 100(@ ¢). 
BELGIAN Conco.— Uvira, two males and one female, in grass, January 
1927. Kamaniola, one male, in grass. Kisenyi, three males, in grass, Febru- 
ary 12, 1927. 
1 In his diary, Dr. R. P. Strong notes having taken ticks from a hippopotamus killed at the Ru- 
churu River, south of Lake Edward. Unfortunately the specimens in question have been mislaid. 
