Annals of the Tkansvaal Museum. 



83^ 



Four representatives of tliis genus are reported from Sontli 

 Africa, only one of wliicli is found in tlie Transvaal, 0. sartfjnj/i 

 caecus. O. sdvignyi pavimentosus is found in German South- West 

 Africa, where caecus is also supposed to exist. 0. talaje ca pen sis 

 is limited in its distrihiition, being confined to the islands oft the 

 west coast of Cape Colony where penguins are abundant. 



The four varieties may be separated by the following key : - — 



Adults and Nymphs. 



A. Body short, oval; widely rounded at ])oth extremities; 

 several teeth upon tarsi and article V of legs. Eostrum 

 without prominent lateral cheeks to form a partial hood for 

 it. 



B. Eyes present. 



C. Teeth upon tarsi and article V of legs, well separated ^ 

 higher than wide and rounded ... ... sarifjuyi. 



CC. Teeth upon tarsi and article V of legs, closer 

 together, wider than high and more quadrilateral 

 in outline ... ... savignyi p(i vi nwnfosus, 



BB. Eyes absent; teeth on coxae as in savignyi 



savignyi caecus. 



A A. Body elongate and narrow, pointed on the anterior end; 

 rostrum Avith prominent lateral cheeks, which partially cover 

 it ; no teeth upon coxae or article V of legs 



talaje capensis^ 



Larvae (only known of two si)ecies). 



A. Length ].()() mm.; width 1.3 mm. .. .. savignyi caecus. 

 AA. Length 1 to 1.5 mm. ; width 0.75 to 1 mm. 



sif vignyi pa vi nientosus. 



Eggs. 



A. Eggs of a leddisli brown colour — O.J) mm. by 0.8 mm. 



savignyi caeca s. 

 AA. Eggs of a darker colour — 1.4 mm. by 1.0 mm. 



savignyi pa vi nwntosus . 



OKNITHODOEOS SAVIGNYI, (AUDOUIN.) 



Argas savigni/i, Audouin (1827). 

 Ornitliodaros savignyi, Koch (1844). 

 Ornitliodoi'os niorhillosus , Gerstacker (1878). 

 Argas mouhata, Murray (1877). 

 Argas scliin.zii, Berlese (1889). 



Ornitliodoros savignyi (Audouin) (Neumann, 1896). 



Adults. — Body a short oval in outline, widely rounded at both 

 extremities, sometimes a little constricted at the sides, at the plain 

 of the third and fourth pairs of legs; colour ochreous yellow when 

 young, darker and even brownish black when adult, the legs of a 

 lighter colour; integument covered with granulations varying with ^be 

 size of the creature itself; hairs abundant, placed between the 



