510 THE ANIMAL PARASITES OF MAN 



Ornithodorus tholozani, Laboulbene and Megnin, 1882. 

 Syn. : Argas tholozani, Lab. and Meg., 1882. 



Without eyes. Males 4 to 6 mm. in length and 2 to 4 mm. in 

 breadth ; females 8 to 10 mm. in length and 4 to 5 mm. in breadth. 

 It especially attacks sheep. Native of Persia and Asia Minor. 



[This species is reputed as being very dangerous to man. It is 

 locally know as the kene, or sheep-bug. In its fully gorged state it is 

 deep violet. F. V. T.] 



Ornithodorus megnini, Duges, 1883. 



Syn. : Argas inegm?ii, Duges, 1883. 



Length 8*5 mm., breadth 5*5 mm. Native of Mexico. 



[Another synonym for this species is Rhynchoprion spinosinu, 

 Marx. The adult males and females are grey to dark brown, the 

 male somewhat the smaller ; female 5 by 3-5 by 2-5 mm. to 10 by 

 6 by 3-5 mm. The larvae at the seed tick stage are dark grey, 

 turning to pink, then to a whitish grey when engorged. The nymph 

 when young is blood-red in front, rest pearly white ; later they turn 

 reddish-brown. 



[Intense pain may be caused by its presence in and around 

 the ears. 



[Two specimens in the nymphal state were taken from the ears of 

 a visitor to Cambridge by Dr. J. Christian Simpson. They were 

 supposed to have entered the ears when the gentleman was camping 

 out in Arizona (Lancet, 1901, i, No. 4,052, p. 1198, fig. 3). 



[This species attacks the horse, ass, dog, cats and oxen, generally 

 around the ears, and also attacks man. It is well known in the 

 United States as infesting the ears of children (Neiv York Ent. Soc. 

 Jonrn. t 1893, pp. 49-52). 



[It occurs in Texas, Arizona, New Mexico and California as well 

 as Mexico, Brazil, and possibly many parts of South America ; and 

 recently Bedford (" Sec. Report Div. Vet. Res., S. African Union," 

 1912, pp. 343, 344) has shown it to occur at Vryburg and Fauresmith, 

 in the Transvaal, on stock. It also occurs in the Sudan. F. V. T.] 



OTHER LITERATURE ON Ixodida. 



(1) " Penetration de VIxodes ricinus sous la peau de 1'homme," Compt. rend. Soc. de Biol.^ 

 1891, xliii, ser. 9, iii, pp. 689-691, R. Blanchard. 



(2) " Notas sobre Ixodidas brazileiros," Mem. Inst. Osivaldo Cruz, 1911, iii, fasc. 2, 

 pp. 145-195, pis. II and 12, Dr. H. de Beaurepaire Aragao. Table of Brazilian Species. 



(3) " Contribuicao para a sistematica e biolojia dos Ixodidas," Mem. Inst. Oswaldo Cruz, 

 1912, iv, fasc. I, pp. 96-120, pis. 2 and 3, Dr. H. de Beaurepaire Aragao. 



