48 Arachnida and Myriopoda 



Genus — Rhipicephalus, Koch. 



Rhipicephalus sanguineus, Latreille. 



This common dog-tick is almost cosmopolitan in distribution, 

 being found in all the warmer, temperate, and tropical countries of 

 the world. It attacks many other animals besides its principal 

 host, sometimes biting human beings. Malignant jaundice in 

 dogs is transmitted by this species. 



Fig. 23. 



Rhipicephalus sanguineus, Latreille. Dorsal and Ventral aspects 

 of the male, x 13. (After Neumann.) 



Genus — Dcrmaccntor, Koch. 

 Dcrmaccntor rcticulatus, Fabricius. 



Dcrmaccntor reticulatus is a widely distributed tick, being found 

 both in Europe and in Northern Asia. It transmits Biliary Fever 

 (due to Piroplasma caballi) in horses in Southern Kussia. In 

 England it is a rare species, chiefly occurring on sheep in 

 Devonshire, but it has also been discovered in Wales. 



This tick is parasitic on sheep, cattle, deer, horses, goats, etc., 

 sometimes attacking man. Wheler states that it has been 

 troublesome to human beings at Kevelstoke. 



