Injurious to Man. 43 



Ornithodoros tholozani, Laboulbene and Megnin. 



This Ornithodoros is a Persian species, and is called Kene 

 (sheep-bug) by the inhabitants of that country. It is a parasite of 

 sheep, and has also been found on camels and domestic fowls. 

 Megnin fed some specimens of this tick, which had been forwarded 

 to him alive, on his own person. 



Family— IXODIDAE. 



The ticks belonging to the family Ixodidae are provided with a 

 distinct dorsal shield (scutum), which covers practically the whole 

 upper surface of the male, but is usually small in the female, 

 leaving much of the upper surface unprotected, and the body is 

 capable of great distension. The capitulum (rostrum) is situated 

 at the anterior end of the body and is visible from above. This 

 family is divided into a number of genera. Many of the species 

 are known to attack man occasionally, but only the principal ones 

 so doing are mentioned below. 



j & 



Genus — Amblyomma, Koch. 



Amblyomma variegatum, Fabricius. 



According to Jcyeux the larvae of Amblyomma variegatum are 

 very abundant in French Upper Guinea at the beginning of the 

 dry season, from early November to February, and they attack 

 both man and other animals. The nymphs of this tick also attack 

 human beings, but less frequently, and Joyeux only observed a 

 single case of the adult attacking man. Larvae and nymphs of 

 this species are said by Neumann to have been found on human 

 beings in the French Sudan, and an adult specimen on a sailor at 

 Nossi-Be Island, near Madagascar. Amblyomma variegatum differs 

 from nearly all the other species of the genus in having the eyes 

 distinctly rounded, instead of flat. 



Amblyomma hcbracam, Koch. 



Larvae of Amblyomma hebraeum, and sometimes also larvae of 

 Bhipicephalus, are said by Sant' Anna to be so numerous in the 

 neighbourhood of Lourenco Marques as to be a veritable scourge, 

 especially in the localities frequented by cattle. They set up great 



