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RHIPICEPHALUS MUHLENSI Zumpt, 1943 (B).

(Figures 281 to 284)

M
MUHLENSt BROWN TICK

L N Q d' EQUATORIA PROVINCE RECORD l Yei domestic cattle Jan

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

DISTRIBUTION

Theiler (correspondence) believes that R. mühlensi 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: SUDAN (Hoogstraal 1954B).

KENYA (Specimens from Makueni; J. B. Walker, unpublished; see HOSTS). TANGANYIKA (Zumpt 1943B. Hoogstraal 1954C. J. B. Walker, unpublished; see HOSTS).

SOUTHERN AFRICA: MOZAMBIQUE (Santos Dias 1950B,1953B). UNION OF SOUTHTAFRICA ATAs R. masseyi in Zululand: Theiler (1947) (Theiler, correspondence). #. HOSTs.7

HOSTS

It is at present impossible to evaluate the relative importance 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 identity 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 (Zumpt. 1943B, Hoogstraal 1954C). Nyasaland warthog (Theiler 1947). Buffalo, nyala, and South African bushbuck (Santos Dias ió50E, 19535). Impala, sable antelope, suni antelope, reedbuck, greater kudu, Cape duiker, Zambesi eland, warthog, 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Theiler's (unpublished) host records (number of hosts, if more than one, indicated in parenthesis) are: from Mkuzi Game Reserve, Zululand, impala, nyala bushbuck (3), reedbuck (2),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 (4), steenbuck, warthog, and bushpig; from Ubombo Flats, Natal, nyala bushbuck. In Miss Walker's collections (corres

pondence) from large numbers of game animals from Tanganyika, 19 males from two buffalos are represented.

BIOLOGY

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

DISEASE RELATIONS

Unstudied.
REMARKS

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

IDENTIFICATION

Male: A distinct, long dorsal process of coxa I associates this species with the R. appendiculatus group of Zumpt (1942C) but peculiar scutal # place it with the R. aurantiacus group (1943B) to which it is referred, not, however, for reasons of indicating phylogenetic relationships but rather for the sake of convenience. Lateral grooves are indicated by a row of somewhat dense and regular punctations, 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. Punctations are of medium size, fairly superficial, and moderately dense; some fine interstitials may be apparent, especially laterally. The basis capituli is strongly angled laterally in small specimens (2.2 mm. long; l.3 mm. wide) but more blunt and elongate in large specimens (4.7 mm. long; 2.6 mm. wide) (as in R. appendiculatus). It should be noted that in the specimen illus# (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 specimen illustrated. The body greatly bulges posteriorly upon engorgement and the median festoon protrudes. Long, pale hairs are especially conspicuous on numerous specimens in the present collection and should receive further study.

Female: The elongately ovoid scutum of this small species lacks lateral grooves and has punctations like those of the male; 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.

Figures 285 and 286, d, dorsal and ventral views Figures 287 and 288, Q, dorsal and ventral views

RHIPICEPHALUS PRAVUS
Sudan Specimens

- 673

[graphic]

RHIPICEPHALUS FRAVUS Donitz, 1910(B)
(= R. NEAWI Warburton, 1912,
R. NEAVI PUNCTATUS Warburton, 1912; and others)
(Figures 285 to 288)
THE EAST AFRICAN CONVEX-EYED BROWN TICK

L N 9 o' EQUATORIA PROVINCE RECORDS
l Ikoto MAN (feeding on) Dec
l Ikoto MAN (feeding on) Feb
l Torit MAN # on) Feb
l Torit. MAN (crawling on) Dec
2 3 Ikoto Atelerix pruneri oweni Aug

[graphic]

191 210 84* 67* Kapoeta Elephantulus rufescens hoogstraali Apr (numerous) 18 90 21* 15* Ikoto Elephantulus rufescens hoogstraari Nov (numerous) 7 31 4 × 2* Ikoto Elephantulus rufescens hoogstraali Dec (numerous 82 16 l2* 4's Torit Elephantulus rufescens hoogstraali Dec (numerous 7 3 2* 2: Torit Elephantulus rufescens hoogstraari Jan (numerous)

2 6 Obbo Elephantulus fuscipes Mar (2) 4 24 12 Kapoeta Lepus capensis subsp. Apr (2 4 15 Ikoto Lepus capensis crawshayi Feb (2) 4 13 Torit Lepus victoriae microtis Feb l l Magwe Poelagus marjorita oweni Sep l TOrit, Canis aureus soudanicus Apr l T TOrit Ourebia ourebi aequatoria Feb 1 TOrit Alcelaphus buselaphus roosevelti Dec 2 Ikoto Rhynchotragus guentheri smithii Dec 3 4. Ikoto Rhynchotragus Fuentheri Smith: Feb (2) 1 TOrit Rhynchotragus guentheri smithii NOV 1 l Torit Sus scofra Senaarensis Mar 3 3 Kapoeta domestic catt Te Jan l TOrit, domestic cattle Jan l Lowudo domestic cattle Jan (SVS) 37 60 Lodwara domestic cattle Jul (2) 58 58 Lodwara domestic cattle Sep l 8 Goniryo domestic cattle Mar

*Unfed adults taken leaving host after molting.

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