134: 



Anjvtals of the Tkansvaal Museum. 



Nymph. — Body oval in outline^ widely rounded behind, narrower in 

 front ; length (unengorged) 1.50 mm., widrh 1.0 mm. ; colour light brown. 

 Shield {XI, c) quadranglar, narrow m front, sides diverging jjosteriorly, 

 posterior edge Avide and convex, cervical emargination shallow ; eyes at 

 postero-lateral angles ; cervical grooves short, wide and shallow ; surface 

 covered with numerous granulations ; colour darker near the anterior end. 

 Dorsal surface with two anterior and three posterior grooves, numerous 

 hue granulations and a few small wdiitisli hairs ; festoons plainly marked. 

 Ventral surface like dorsal ; genital grooves reaching nearly to posterior 

 margin ; anal groove and ano-marginal groove well marked ; festoons pre- 

 sent ; stigniatic plates elliptical in outline. Rostrum (XI, c) Avith base very 

 wide and short ; lateral angles very prolonged and sharp at anterior 

 quarter of length ; palpi slender, inserted on ventral surface ; article 1 

 very small, article II twice as long as wide ; article III not quite as long 

 .as article II ; pit on medio-ventral surface bears article IV ; hypostome 

 slender, l)ears four rows of teeth with about seven teeth in a row ; 

 mandibles as in female. Legs long and slender ; coxae all rectangular ; 

 coxae I prolonged anteriorly, each coxae with two posterior teeth (X/, h); 

 tarsi long, sAvollen in centre. 



Larva. — Body oval, much longer than wide ; colour light yellowish 

 browu, shield darker ; 0.50 mm. wide by O.GG mm. long ; when engorged 

 they reacli a length of 1.50 mm. by O.iyiy mm. wide, sides nearly parallel, 

 widely rounded l)ehind and narrowed in front ; colour dark reddish or 

 bluish. Shield covers a little more than the anterior third of the 

 body when engorged ; wider than long ; posterior edge only slightly convex ; 

 lateral angles rounded, and not at margins of body ; deeply emarginate in 

 front to receive the rostrum ; cervical grooves shallow, a few spines present. 

 Dorsal surface {XI, f) with three to five grooves ; festoons well marked. 

 \'entral surface {XI, f) with genital grooves and posterior grooves 

 normal ; stigniatic openings in four pairs, one behind each pair ol coxae, 

 .and the fourth in tlie fourth festoon from the central one ; three pairs 

 of spines between coxae ; numerous spines in posterior portion. Rostrum 

 on a long neck, ])ase very wide and short, lateral angles very sharp ; palpi 

 inserted on ventral side of rostrum ; palpi swollen in middle, constricted 

 at base and conical at tip ; article I very short, article II Avider than long, 

 SAVollen at middle ; article III conical ; article IV in a pit on the median 

 ventral surface of article III ; hypostome slender, four roAvs of teeth ; 

 mandibles as in female. Ljcgs thick ; coxae all quadrangular, coxae I 

 Avith an anterior prolongation Avhich projects beyond the shield and shoAvs 

 from dorsal surface ; each coxae Avith a single posterior tooth ; tarsi thick, 

 conical at tip. 



Bggs. — Light brown in colour, elliptical in outline ; surface polished ; 

 length 0.5 mm., width 0.3 mm. 



Hosts. — Dog, horse, hare, goats, sheep, rabbit, cattle, lion, bush-pig 

 (Potamochoemus choeropotamus)^ hedgehog {Erinaceus frontalis), wild dog 

 (Lycaon pictus). 



Hahifat. — Turkestan, Borneo, German East Africa, Abyssinia, Sierre 

 Leone, Transvaal, Cape Colony, Madagascar, Moc^ambique. 



This tick assists in the transmission of East Coast fever. It seems to 

 be confined to the more humid areas of South Africa. In Cape Colony it 

 is confined more to the coastal l3elt of summer rainfall. In the Transvaal 

 it seems to be most common in the bush and Ioav veld, and more rare in 

 "the south-west high veld. 



