AMBLYOMMA 



723 



Amblyomma Koch, 1844. 



Ixodinae with flat eyes; rostrum long, with valvate palpi. Anal 

 groove semicircular, opening anteriorly. No median ano-marginal 

 groove; no anal plates in the male. Stigmata triangular. Nearly 

 always eleven festoons. 



Type Species. — AmUyomma cajennense Koch, 1844. 



a b e 



Figs. 336-338. — Amblyomma hebrceum C. L. Koch, 1844: Ventral Aspect. 

 a, Male (X 7); b, mouth parts (more highly magnified); c, female (X 7). 



Amblyomma hebrseum C. L. Koch, 1844. 



Synonyms. — A. annulipes C. L. Koch, 1844; Ixodes poorlmani 

 Lucas, 1850; A. hassalli Marx and Neumann, 1899. 



This tick is found in Africa, especially in Cape Colony, where it is 

 called the ' bont ' or variegated tick, and is the spreader of ' heart 

 water ' in sheep and goats. 



Morphology. — -Male (vide Fig. 336) with sulphur-yellow-coloured 

 scutum, variegated with brown, and finely punctated and marked 

 with longitudinal grooves. Marginal festoons light-coloured except 

 the two extreme festoons. Female with brown and white scutum, as 

 broad as long; body of a fully replete female, 24 by 15 millimetres. 



Life-History. — The usual life-history for Ixodidae. 



Pathogenicity.— Transmits ' heart-water ' in sheep. 



Hocyalomma Koch, 1844. 

 Ixodinae with eyes, rostrum long, palpi valvate, anal groove 

 semicircular, opening forwards, uniting sexual grooves, and followed 

 by a median ano-marginal groove. Male with two pairs of ventral 

 shields, two adanal and two lateral. Female with triangular stig- 

 mata. 



Type SpBcies. — -Hyalomnta cegyptium Linnaeus, 1758. 

 Only a few species: — H. <^gyptium, H. crassitarsus, H. affine, H. 

 syriacuM, H. rhipicephaloides, H. hippopofamense, H. monstrosum. 



