3 oi 



two on each side, are present in the male of Eurhipi- 

 ce-phalus. The shape of the plates varies in different 

 species. 



The Ventral Shields. These are, as a rule, less 

 conspicuous sclerites, which cover the ventral surface 

 in the male. The arrangement of these plates, or 

 sclerites, differs in the different species (Fig. 96). 



Marginal festoons 



ig- 97- (Left figure) Female tick (Hyalomma). Scutum = 

 black, the white spots are the eyes. D.S.P. = dorso sub-median 



porose areas. 

 (Right figure] Posterior ventral extremity of a tick (Aponomma) ; 



A anus ; C. 4 = coxa of fourth leg ; 5 = stigma 



Marginal Festoons. Also most marked in the males 

 of certain species, notably in Amblyomma (Fig. 96), 

 where they are eleven in number. The median festoon 

 in some males (Eu. decolor atus, M. annulatus, v. caudatus) 

 forms a short but distinct tail (Fig. 96, bottom right- 

 hand corner). 



The Genital Opening. Close behind the rostrum, 

 on the ventral surface, is the opening of the genital 



