Animals of the Tkaxsvaal Museum. 



157 



November, 1907. I also took specimens from a hedgehog found near 

 Pienaar's Eiver a few weeks hiter. 



This gemis is an intermediate from between EJivpicephalus and 

 Dennacentor. Tlie palpi and general form would lead one to place it in 

 the genus Blilpicephalus, \mi the size of the posterior coxae and the absence 

 of anal plates in the male bring it closer to Deriiiareiitor. Nuttall and 

 Warjjurton in 1907 described a species Bhipiceiifor hi corn is, from which this 

 _g-enus was erected ; again, early in 1908, Neumann described the same 

 -•species which he called Rhipicephalus gladiger, not knowing that it had been 

 previously descril^ed. Upon examining tlie specimens of viciiius, 

 which we forwarded to him for determination, he came to the con- 

 «clusion that they would warrant the establishment of a new genus, and by 

 -a rare coincidence proposed the name Bliipicentor. Before publication, 

 liowever, he found that he had l^een anticipated ])y Nuttall and War1)urton. 



' There are only two species in the genus, biroriiis and vicinus, the 

 latter of which is found in the Transvaal. The co-types of vicinus are 

 'deposited in the Ti^msvaal Museum, Pretoria. 



Genus DEEMACENTOE. KOCH. 



■ ^ 7.ror/e,s (ex p.), Latreille (1795). . , . ' ■. 



Dennacentor, Koch (181:1:). - : \ ■ ■ 



Pseuclixocles, Haller (1882). 

 Dernuicentoi', Koch (Neumann, 1897). 



Eyes present, base of rostrum wider than long, rectangular on the 

 dorsal surface ; palpi short and thick ; stigmatic plates^ short and comma 

 .shaped. Ventral surface of male without shields, similar to that of female. 

 C^oxae I bidentate in both sexes ; coxae IV in the male very much larger 

 than tlie others. Dorsal shield usually ornamented with various designs. 



Only one species of Derniacenfor has been reported from South Africa, 

 D. rJiiiiocerofns. I have never seen specimens of this species, l)ut the 

 •description as given ])y Neumann follows : — 



DEEMANCENTOE EHINOCEEOTLS. (DE GEEE). . 

 The Ehinoceeos Tick. 



Acanis rJi iiioceroiis, De Geer (1778). 



Ixodes rliinoceriiius, Denny (1843). ... 



Ixodes rlnnocerotis, Gerxms (18-14). 



Amhlyoin rua rli i iiocerofis, Koch (1844). 



A))d)]ijoni ma rliinoceriinis, Koch (1844). 



Derniacenfor rJiinocerotis, Gerstiicker (1873). 



Derniacenfor rJiinocerotis (De Geer) (Neumann, 1897). 



Plate XVI, figures o, p (a, h). ... 



Male. — Bodij oval, ^^■ider behind, a little restricted at the level of the 

 'eyes. Dorsal surface (XVJ, o) convex, 7 to 8 mm. long l)y 5 to 5.5 mm. 

 ivide; ground colour of shield clear brick red on specimens from Natal, ochre 

 jellow or greenish yellow on tliose from ^focamluque, s]:)ots of reddish 



