S06 REPORT OF THE HARVARD AFRICAN EXPEDITION 
TANGANYIKA TERRITORY.— Kigoma, one male, in grass, January 24, 1927. 
According to J. Mareq (1924, Ann. Gembloux, XXX, 1, pp. 1-40), &. ap- 
pendiculatus is the most common cattle tick in Ruanda, where it appears to 
be the carrier of African East Coast fever, caused by Theileria parva (Theiler). 
Van Saceghem (1925, Bull. Agric. Congo Belge, XVI, pp. 582-591) claims that, 
owing to the low temperature especially at night, East Coast fever does not 
spread among cattle above the altitude of 2500 m. in Ruanda. In South Africa 
the disease is generally transmitted by R. appendiculatus; but other species 
of the same genus, such as R. simus, R. evertsi, and R. capensis, may also act 
as vectors. 
Rhipicephalus longus Neumann 
Rhipicephalus longus Neumann, 1907, Ann. Trop. Med. Paras., I, p. 117, figs. 24-25 (#; Kasongo, 
Belgian Congo); 1911, ‘Das Tierreich, Lief. 26, Acarina, Ixodidae,’ p. 36 (<7). 
Rhipicephalus falcatus Neumann, 1908, Notes Leyden Mus., XXX, p. 77, fig. 4 (o 9; north of 
Lake Nyasa and Liberia). Warburton, 1912, Parasitology, V, p. 20. Nuttall, 1916, Bull. 
Ent. Res., VI, 4, p. 327, fig. 23 (7). 
BELGIAN Conco.— Southwest of Bungulu (new Beni), Ituri Forest, many 
males and females, off buffalo, Syncerus planiceros (Blyth), May 138, 1927 (R. P. 
Strong). 
As Warburton has shown, the type of R. longus was a somewhat ill-char- 
acterized male of R. falcatus. The name R. longus antedates, however, that 
of R. falcatus and must be retained for the species. 
Rhipicephalus simus C. L. Koch 
Rhipicephalus simus C. L. Koch, 1844, Arch. f. Naturgesch., X, 1, p. 238 (<7; South Africa). 
C. W. Howard, 1908, Ann. ‘Transvaal Mus., 1,2; p. 1382, Pl: Vil, tie. f; Pl eg Pe 
figs. f andi; Pl. XI, figs. c, f, and h (o 9, nymph, larva, and egg). Newstead, Dutton, and 
Todd, 1907, Ann. Trop Med. Paras., I, p. 100 (# 9). Dénitz, 1910, Denkschr. Med.-Naturw. 
Ges. Jena, XVI, p. 473, Pl. XVIb, fig. 15 (# 9). Neumann, 1911, ‘Das Tierreich, Lief. 26, 
Acarina, Ixodidae,’ p. 37 (o ¢). Nuttall, 1916, Bull. Ent. Res., VI, 4, pp. 331 and 345, 
He ZOU Aa. 
Rhipicephalus senegalensis C. lu. Koch, 1844, Arch. f. Naturgesch., X, 1, p. 238 ( ¢; Senegal and 
Egypt). 
Rhipicephalus praetextatus Gerstaecker, 1873, in v. d. Decken’s ‘Reisen in Ost-Afrika,’ III, 2, 
Gliederthiere, p. 468 (o*; Mombasa). 
Rhipicephalus perpulcher Gerstaecker, 1873, in v. d. Decken’s ‘Reisen in Ost-Afrika,’ III, 2, Glieder- 
thiere, p. 469 (2 ; Mombasa). 
Breieian Conco.— Ruchuru Plains, several males and females, off wart- 
hog, Phacochoerus africanus (Gmelin), April 5, 1927 (R. P. Strong), and off 
buffalo, Syncerus caffer (Sparrman), March 3, 1927 (H. Coolidge). 
TANGANYIKA TERRITORY.— Sagayo, Mwanza, several males and females, 
off a civet cat, Civettictis civetta orientalis Matschie (Arthur Loveridge). Kilosa 
off leopard, Felis pardus suahelicus Neumann, and off a genet, Genetta sua- 
helica Matschie (Arthur Loveridge). 
R. simus is one of the more widely distributed species of the genus, occurring 
all over Africa, from Egypt and the Senegal to the Cape. It has a variety 
