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Santos Dias (l954G) opines that (1) A. ematium is a separate s cies, (2) A. schlottkei Schulze, I93 , mig be a synonym, and (3))eA. faiai Santos DIas, I951, definitely is a synonym. The specificlty of A. ematium is hardly convincing on the basis of descriptions and i us ra ions, though there is a possibility that comparison of specimens may provide yet unmentioned clues to separate this morphologically from A. nuttalli. Breeding experiments are also indicated.



A. nuttalli is similar to A. marmoreum in characters mentioned under_that specles, except for the I'oIIoFIng: Males: Size is smaller, always less than 6.0 mm. long. Pale ornamentation of the scutum is somewhat variable, but all specimens are like the one illustrated in that the dark areas are less extensive and more broadly separated from each other by light areas than they are in marmoreum.


2 Females: This sex is also smaller than that of A. marmoreum (body approximately 7.0 mm. long, 5.5 mm. wide; scutum a53ut 3.2 mm. long, 3.3 mm. wide); the central pale scutal ornamentation tapers to a narrow point posteriorly and is therefore very distinctive.


Figures 80 and 81, o“, dorsal and ventral views Figures 82 and 83, 9, dorsal and ventral views

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This specimen, identified by Dr. G. Theiler, is the only one of this species from the Sudan. It represents an apparently rare intrusion into the western half of Equatoria Province from the Belgian Congo. Ecologically, the Yei area, except for a few hill masses, does not seem suitable for the survival of this mountain. inhabiting species though other localities in the eastern high. lans of Equatoria Province might well meet its requirements. See_A. superbum, REMARKS below.


A. sum is a highland tick of eastern Central Africa, adjacent pargs of East Africa, and northern parts of southern Africa. See also REMARKS and IDENTIFICATION below.


and Warburton 1916. Seydel 1925. Robinson 1926. Schwetz 1927A. Bequaert 1931. Neitz l9L7. Schoenaers 1951A. Theiler and Ro_ binson 1954. Note: Santos Dias l953E refers most of these

Congo reports to his A. su erbum sp. nov. However, correspondence with curators reveals that e had not examined the specimens on which these references were based).

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KENYA (See Note under 11)EN'I‘H‘ICAII‘ION below). UGANDA (Hoogstraal 19540) . TANoAlr1TRI' (Donitz 1909).

SOUTHRN AFRICA: ANGOLA (Leitao 1942. Robinson 1926. Santos Dias 1956!. DaceIar 1950. Sousa Dias 1950, this report referred

to A. su¥_Erbum sp. nov. by Santos Dias 1953E; see IDENTIFICATION below. ei er and Robinson 1954. Rousselot 1953B). MJZAMBIQUB Z‘ Robinson 1912*, 1926*. Santos Dijas l947A,l953B*,l954A,C*. According to Theiler correspondence , A. varie atum ovurensis Santos Dias (19508), from the extreme-north 0% S51 do Save Eov. ince, is synonymous with A. sum. Recently, Santos Dias (195312) has agreed with d11sH{nLv ew; see IDENTIFICATION be1ow_7.

N(1iTHERN RHCDESIA (Robinson 1926. Matthysse 1954. Theiler and Robinson 1954). SOUTHERN RHODESIA (See REMARKS below).


Domestic cattle are referred to as hosts of A. m sum by most authors, but Matthysse (1954) found it only En ~s, and then rarely, in Northern Rhodesia. Mules (Nuttall and War. burton 1916. Robinson 1926. Sousa Dias 1950). Horses (Theiler, unpublished records). Sheep, goats, dogs, donkeys (Sousa Dias 1950 .

Man (As synonyimus A. varie atum nocens: Robinson 1912* and subsefintly frequently quoted withdut Zdditional observations).

"'Striped antelope" (D'dnitz 1909). Sable antelope, roan ante. lope, and eland (Robinson 1926, Schwetz 1927A; Congo specimens in Onderstepoort collection). Hartebeest, kudu (Robinson 1926).

Zebra) (Schwetz 1927A). Buffalo (Jack 1942*). Wart(.hog (Schoenaers ) 1951A . Ankole topi Damaliscus korrigum andae Hoogstraal 19540 . The nymphal specimen,from a monkey, mentioned 5; Santos Dias (19542),

should be checked against A. varie atum. "Wild hosts only in Northern Rhodesia“ (Matthysse I9§Z).



See REMARKS and IDENTIFICATION below. All authors who refer

to collecting localities for A. E%§1_nl1 stress the fact that it is a highland species.

s recor s ould be re in con unction wit statements :1 REMARKS and in IDENTIFICATION below.


E‘: A. ~Ann is said to attack African children's heads and causes sIoug ng o the skin. This has not been substantiated.

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According to Robinson (l9l2*), A. m sum (= A. varie atum nocens) occurs in the Rhodesias and Roz que chiefly In Bushveld from 2000 to 3000 feet elevation and seldom above [.000 feet. He further stated that this tick is notorious for the damage it does to stock in the Rhodesias, where it is known as the "Pyaemia tick‘. However, Morris (l933,l935,l936) attributed "'tick..pyaemia"‘ in Northern Rhodesia to A. varie atum. In Southern Rhodesia, Jack (1918) referred "ixod'ic Iymphangitis“ to A. varie atum, Sinclair (1916) associated skin diseases of cattle_witE A. varie atum, and Jack (l928,l937,l9l.2) also mentioned only A‘. varie atum with reference to abscesses and sloughing of the hosts‘ sHn. In his first two papers Jack did not differentiate between A. varie atum and A. sum, but in his 191.2 report he stated that the Iocal

highI s w ere win would be expected to occur, are free of amblyommas but t at some male specimens of A. variegatum from

the lowlands may show a tendency to resemble AT Egosum. See also IDENTIFICATION below.

Theiler (correspondence) calls attention to the following facts that may modify many of the above reports concerning A. ~. Robinson's (1912 ,l926) remarks concerning A. o - sum

n zambique and Southern Rhodesia are based on statements of Mr. E. M. Jarvis. Jack's recordsfor Southern Rhodesia apparent. ly are quoted from the same source, for no further data are pre. sented. The extensive Onderstepoort collection has no speci.. mens from Southern Rhodesia. Thei1er's correspondence with

Dr. Lawrence, Assistant Director (Research) of the Southern Rhode. sia Veterinary Department, indicates that he is not aware that _A.


*This record should be read in conjunction with statements in

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