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L N 9 0"‘ IEQUATORIA PROVINCE RECORD 1 Yei domestic cattle Jan

R. nfihlensi is known in the Sudan by only a single specimen.



Theiler (correspondence) believes that R. mthlensi has been frequently misidentified and that its range is more extensive than present records indicate.


CENTRAL AFRICA: BELGIAN CONGO (Theiler and Robinson 1954. These authors also attribute certain other earlier published remarks by other authors to this species).

EAST AFRICA: sunm (Hoogstraal 195413).

KENYA (Specimens from Makueni; J. B. Walker, unpublished; see HOSTS). TANGANYIKA (Zumpt 1943B. Hoogstraal 19540. J. B. Walker, unpublished; see HOSTS).

souranmv AFRICA: MOZAMBIQUE (Santos Dias l950B,l953B). wIoN~A [ As 13. masse i in Zululand: Theiler (1947) (Theiler, correspondence). gee HOSTSi7


It is at present impossible to evaluate the relative impor_ tance of the few records from domestic animals in relation to the wide variety of large game animals that this tick is known to attack. As workers become better acquainted with the idetity

of this tick more accurate data concerning its hosts and biology are bound to result. Hosts of the immature stages are unknown, except for a single nymph (J . B. Walker, correspondence) from an African civet in Tanganyika. '

Domestic animals: Cattle (Sudan and Walker's Kenya records, above). Dog (Santos Dias 1953B).

Wild animals: Bushbuck and giraffe (Zumpt 1943B). Roan antelope (Zum t 1943B, Hoogstraal 19540). Nyasaland warthog (Theiler 1947 . Buffalo nyala, and South African bushbuck (Santos Dias 1950B,l953B). Impala, sable antelope, suni ante. lope, reedbuck, greater kudu, Cape duiker, Zambesi eland, wart. hog, and buffalo (Santos Dias 1953B). Kudu (Walker's Kenya record above).


Theiler's (unpublished) host records (number of hosts, if more than one, indicated in parenthesis) are: from Mkuzi Game Reserve, Zululand, impala, nyala bushbuck (3), reedbuck (2), duiker (1.), steenbuck, warthog, and bushpig; from Ubombo Flats, Natal, n ala bushbuck. In Miss Walker's collections (corres. pondence from large numbers of game animals from Tanganyika, 19 males from two buff alos are represented.


This species is now being reared at Onderstepoort (Theiler, correspondence) .


Unstudied .


The Sudan material recorded above was compared by Dr. G. Theiler with type material in Dr. F. Zumpt's collection.


Male: A distinct, long dorsal process of coxa I associates this species with the R. a ndiculatus group of Zumpt (19426) but peculiar scutal characters place It with the R. anrantiacus group (l943B) to which it is referred, not, howev§r, for reasons of indicating phylogenetic relationships but rather for the sake of convenience. Lateral grooves are indicated by a row of some. what dense and regular puctations, though shallow lateral grooves as such may be present just anterior of the proximal festoons. Posteromedian grooves are shagreened, distinct, long, and narrow; paramedian grooves are shorter and wider, also shagreened. Pumc. tations are of medium size, fairly superficial, and moderately dense; some fine interstitials may be apparent, especially lat. erally. The basis capituli is strongly angld laterally in small specimens (2.2 mm. long; 1.3 mm. wide) but more blunt and elongate in large specimens (4.7 m. long; 2.6 m. wide) (as in R.

a ndiculatus). It should be noted that in the specimen illustratgd (Figure 281), the basis capituli is exceptionally short

and wide. The adanal shields (Figure 282) are most characteristic though in some individuals the width of the posterior section is not so great as in the specien illustrated. The body greatly bulges posteriorly upon engorgement and the median festoon po. trudes. Long, pale hairs are especially conspicuous on numerous specimens in the present collection and should receive futher study.


Female: The elongately ovoid scutum of this small species lacks lateral grooves and has punctations like those of the halo; punctations are rare laterally anterior of the flat eyes and on the scapulae; cervical grooves are faintly indicated if at all. The basis capituli appears to be more consistently sharply angled than that of the male, but this might be a variable character.

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Figures 285 and 286, 0‘, dorsal and ventral views Figures 287 and 288, Q, dorsal and ventral views

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