5. Lateral grooves reaching scutal mlcL 

 length; scutum largely covered by 

 small and medivim-size punctations. 

 (Medium-size; Near East: North, West, 



and coastal East Africa) H. IMPELTATUM 



Figures 170 and 171 



Lateral grooves confined to posterior 

 third of scutum; scutum smooth with 

 few, scattered, usual 1 y large puncta- 

 tions; posterior grooves characteris- 

 tically marked. (Large ticks of camels 

 wherever these animals now or recently 



occurred ) H . DROMEDARII 



Figures 162 and 163 



6. Lateral grooves confined to posterior 

 third of scutum; scutum almost im- 

 punctate except in caudal depressed 

 area. (Usually small ticks; Mediter- 

 ranean Basin, Near and Middle East; 

 East African coastal areas and northern 



Sudan) .H. EXCAVATUM 



FigTn*es~166 and 167 



Lateral grooves reaching at least scutal 

 midlength (if specimen is heavily punc- 

 tate, grooves may be obscure) 7 



7. Scutum smooth, shiny with rare, scattered 

 large punctations; lateral grooves long 

 and usually very distinct; posterior 

 grooves well marked; legs usually not 



ringed H . DETRITUI'l * 



Figures''l60 and 161 



*A closely related "form" of uncertain taxonomic status, "H. 

 scupense", with some biological and morphological characters 

 differing from those of typical H. marginatum , occurs in parts 

 of the Soviet Union and southeastern Europe. 



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