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Figures 249 and 250, 0‘, dorsal and ventral views Figures 251 and 252, Q, dorsal and ventral views

RHIPICEHILUS BEQULHITI
<9, Central Brican Specimen later Zumpt)
9, Sudan Specimen

.. 619..

RHIPICEPHALUS BEQUAERTI Zupt, 1950.
(Figures 21.9 to 252)
BmUAEF.T'S EHOYN TICK

L N 9 <3‘ EDUATQRIA PROVINCE RECORD
1 Nagichot domestic goat Dec

Nagichot is at 6500 feet elevation in the Didinga Mountains of Eastern District. 11. beguaerti is known from the mdan by only this single specimen.

DI3I'R IBUT ION

E. be uaerti appears to be a rare, mountain..inhabiting tick of Centrfi Erica and nearby mountains of the Sudan.

CENTRAL AFRICA: "Central Africa, Lissenji" (Zumpt 1950A).

Dr. Theiler E I cannot locate "Lissenji" but believe that it

may be a misspelling for Kisenyi, which is in Ruanda Urundi. RUANDA... URUNDI ("Ljenda; 2500 mters altitude ," Rousselot l95l,l953B. This material has been checked by Dr. 0. Theiler).

EAST AFRICA: SUDAN (Hoogstraal 19545).

HOSTS

Buffalo (Zumpt 19505). Domestic goat (Sudan data). Cattle (Rousselot 1951 ,l953B) .

BIOLOGY

Unknown. This tick should be searched for especially at high altitudes.

DISEASE RELATIONS

Unknown.

IDENTIFICATION

with so few specimens extant the variability of R. bgquaerti cannot be determined. , '

Males. This sex is easily recognizable by complete absence of lateral grooves that are replaced by a line of large punctations bounding the raised lateral ridge. Medium.size scutal punctations ae arranged linearly like those of R. simus but are interspersed with numerous fine interstitial punctatIons. The posteromedian groove is long and narrow, the paramedian grooves are curved and wider. The cervical pits are short, deep, and punctiform. The adanal shields are L shaped with a heavy, broad base, convex internoanterior margin, and other margins straight with rounded junctures. Coxa I has a small but distinct dorsal pojection.

The original description states that the spurs of coxa I are "strikingly short‘ but the illustration accompanying the des. cription hardly verifies this statement. Color is reddish.brown.

Females. The scutum is approximately as wide as long and its posterior margin is abruptly rounded. Lateral grooves are greatly reduced, being restricted to the anterior half of the scutum; bordering these grooves the lateral ridges rise sharply. Cervical pits are wide and deep; cervical grooves reach almost to the posterior scutal margin. Punctations are large and widely scattered, interstitial punctations are stronger than in the male. The basis capituli is twice as wide as long, with rightangled lat. eral angles and short, rounded cornua; large porose areas are circular or subcircular and spaced apart from each other by less than their own diameter (in _s. simus, these are small, circular,

and spaced far apart).

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A small dorsal process of coxa I is present on the Sudan spec. imen, though this process is stated to be absent on the type fe. male. Eyes of the Sudan specimen are situated on the scutal mar. gin, dark amber color, elongately oval, very slightly convex, and delimited by a shallow groove along the internal border. The Sudan specimen was identified by Dr. G. Theiler.

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Figures 253 and 254, 6', dorsal and ventral views Figures 255 and 256, Q, dorsal and ventral views

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RHIPICEPHALUS CCMPOSITUS

an pecimens

PLATE LHII

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L N 9 d‘ EQUATORIA PROVINCE REXJORDS 2 l Nimule erus caffer ae uinoctialis Dec 3 2 Kheirallah erus caffer 529 c 1 s _ (SGC)

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These specimens, from the east and west banks of Equatoria Province, are the first of R. co situs from known localities in the suash. Although the Mek~pellw Hierallah on the label) specimens were collected in l9ll by H. H. King, they had remained unidentified in Sudan Government collections. For further comments on these specimens, see BIOLOGY below.

DISTRIBUTION IN THE SUDAN

The type locality given by Neumann (1897) for R. co situs

is Khartoum. It is obviously impossible that this ti~ 8811 established in this desert evironment in recent times. Un. fortunately, the souce of specimens provided Neumann was free quently incorrect and his acceptance of collectors‘ information has subsequently led to numerous misconceptions before knowledge of the species concerned became detailed enough to recognize these errors. It is hardly likely, in the troubled and harassed times when the type specimens were reputed to have been collected at Khartoum, that cattle were being imported there in any numbers from areas where this tick is likely to occur. It is possible, but not very pobable, that the collector merely lumped the vast poorly_explored northeastern African area of his day under the heading Khartoum. The normal occurrence of R. co situs out. side of Equatoria Province in the Sudan is hardly go 55 expected, ad even in this Province it is probably restricted to the rather

few highlan outcrops and their vicinity.

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