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seventeen of these giraffes and the light to moderate infestations on the remainder of these animals is noteworthy. These data con.. tribute to other from this area indicating that the bulk of the A. varie atum population does not commence reproduction until well

in' to ihe rainy season (June, July).

The presence of two male A. le idum on these giraffes is of some interest inasmuch as ecologic conditions in Bahr El Ghazal seldom meet this tick's requirements. A. le idum populations in this Province are either small, rare, and restricted, or else

introduced but not thriving. From the fact that only a single male R. s. simus and no R. e. evertsi were taken it would appear

that Eiraffes are not favored hosts of these ticks, which are common on other aninnls in the area.

The frequency with which both sexes of H. rufi s and of H. truncatum were found on the same hosts from Ffarch tgough June1' ndicates breeding of these species late in the dry season and through the first half of the rains. Data for other seasons are not available. The small amount of data for both sexes of H. truncatum feeding in August may indicate that adults contirffie to appear and mate throughout the rainy season or else that a second generation has reached adulthood later in the rains.

b_4. reidi sp. nov. is known only from these collections. Whether it is a typical parasite of giraffes remains to be deter. mined. The small amount of available data suggest that the repro.. ductive season commences early in the rains.

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Nineteen BUFFALOS in the Forest were infested by 186 ticks, as shown in the table below. Seasonal data for mles and females are in general similar to those obtained from ticks infesting giraffes in this area. The low incidence of infestation of these buffalos by truncatum is noteworthy.

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9“ 2 6‘ 9 9‘ 2 L3 Feb 6 4 (R. longicoxatus 1 @. truncatum 7 6 4 Feb 1 R. s. si mus 16 4 5 Mar 6 9 Iepidum 1 6 Mar 2 7 Mar 2 l 8 Apr 1 H. truncatum 1 9 Apr E. *'i"_'s. s mus 1 10 Apr H. truncatum 18 11 Apr 3. simus 4 1 12 May 2 3 13 May 1 5 14 May 2 15 Jun 18 6 16 Jun 1 17 Jun 6 2 2 1 18 Jun 10 7 2. senegalensis 1 1 19 Jun 17 9 TOTAL 60 25 21 18 /+7 15

Of the ANTELOPES, the TIANG was most common in the Forest area and all specimens observed were tick infested. When we arrived in February, approximately a hundred dried skins of tiang obtained earlier in the dry season were examined. Each bore from one to 23

dead nymphs of A. varie atum, the average number being in the vicinity of ten or twelve. A few dead male H. truncatum and A. varie.

gatum also remained on the skins. Sever'5l Hosts secured ‘Early in

the rainy season were infested by adult A. varieéatum. The high incidence of A. varie atum infestation a'fid e a sence of other common ticks '(i.e. R. s. simus, R. e. evertsi, H. rufi s) on the tiang is of interest. _A111'1n_aI§ exaniinedqfmiately er death yielded, besides A. varie atum, only a few H. truncatum and B. decoloratus. In IprII, two pairs of R. tribus is E a female

of H. Ieachii muhsami were found on o'r'1e ~m July four malas and seven femaIes of H. aciculifer were rennved from an. other. The latter species ‘also Ifiesta a tiang near Tonj (March).

Also noteworthy is the fact that no ticks were found on a number of WATEBUCKS and WI-lITE.EARFD KOBS in the Forest. Three ROAN AN'1‘FI.OPES were infested by (1) two male and a female H. truncatum and the same number of A. varie atum (September)-,' (2) seven Hale and a female A. varie '5.tum (Iugust), and (3) a male H. truncatum and a nymphil I. varIe atum (March). On a HARTE. B~n July, single '5du'l'ts 0% A. varie atum and B. decolo. ratus were found. An QRIBI obtained In une e ed a ‘ne1_R_e . tricuspis; another, near Tonj in March, two male R. sulcatus:

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L“! Two pairs of adult R. s. simus and nine nymphal A. varie atum were taken engorging on members of our party in the Farest IE February. South of Yirol, a female R. sulcatus was taken while crawling on the collector's leg.

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A. rsicus is common at Van the only locality in which a search for tfis tick has been madé.

DQIIESTIC MAMMALS

HORSES are attacked chiefly by B. decoloratus and_R. 3. evertsi; several collections from single Esta contain as many by ticks of each species. One horse at Van was infested by twenty adult A. varie atum, another at Busseri by eleven adults of this fickfi we as by three adult 5. triousEi_s, and others by single males of rufiEs.

DONKETS are heavily infested by 2. evertsi. Found on them in lesser numbers are nymphal A. varie aium, and adults of B. annulatus, B. decoloratus, H. rufipgs, and _H. truncatum.

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A PIG at Wan (August) was infested by five male and two female A. variegatum and a pair of adult R. §. sinms.

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DOGS throughout the Province are almost invariably infested by several specimens of R. _s. san%eus and some serve as host for dozens of nymphs and adults. are adults of R. s. sinnis and H. 1. leachii and nymphs of A. varie atum were .130 TouE_E‘E ?erIousl'?e§ities. A numbeY' o~. decoloratus from Dinka dogs at Fanjak indicate that where-dogs E cattle sleep in the same hut the former are attacked by the latter's para. site.

CATS at the Forest and at Wau provided a few specimens of H. leachii muhsami.

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) CATTLE were observed in all areas shown on the map (Figure 3 .

Dinka long.horn cattle are regarded with religious fanaticism by their owners. During the dry season the young tribesmen and their great herds migrate to the toich, low lying pastures along the rivers that are inundated during the floods. At the onset of rain they return to their homeland for grazing. People, dogs, and cattle sleep together around the campfire or in huge, smoke filled huts. It was estimated that a quarter of a million cattle passed the Jur Narrows area, in which the GaluaJ...Nyang Forest is situat. ed, on their annual trek to the toich, but no estimate of the total livestock population of this Province is available. For twelve months, 1950-1951, the Veterinary Department reported 64,031 hides from Bahr El Ghazal; in contrast, only 775 from Fquatoria.

Cattle are almost always parasitized by variable numbers of A. varie atum. The infestations are commonly moderate but not'in'£'requen"ily heavy, as mny as fifty to a hundred ticks being found on a single animal. During the dry season the proportion of females to males is in the range of one to five hundred, but late in April it becomes one to fifty, and in July and August

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