372 THE ANIMAL PARASITES OF MAN 



to the host and the interval may be extended to upwards of 

 a year according to Lounsbury. 1 



This so-called Persian tick, the Miana, which is such a scourge 

 to travellers in Persia, appears to infest the huts of natives in 

 Persia. It has recently been sent me from Quetta, where it has 

 invaded houses to such an extent, the natives cannot live in them. 

 The virulence of its bite is probably due to the tick trans- 

 mitting fever germs from natives, probably inured, to strangers, who 

 would be susceptible. F. V. T.] 



Argas chinche, Gervais, 1844. 



This acarus, a native of the temperate parts of Columbia, is 

 very troublesome to man. It is probably identical with Argas 

 americanus, Packard, which infests domestic fowls and turkeys, 

 and occasionally also cattle, 2 and is differentiated from Argas 

 reflexus by the sculpturing of the cuticle. 



Ornithodoms savignyi (Audouin), 1827. 



Syn. : Argas savignyi, Aud., 1827 ; Ornithodorus morbillosus, Gerstacker, 1873 , 

 Argas monbata, Murray, 1877 ; Argas schinzi, Berlese, 1889. 



Differentiated from Argas by its more rectangular body, the 

 peculiar sculpturing of the cuticle, and by other characteristics 

 into which we need not enter. Ornithodorus savignyi has eyes ; it 

 occasionally attains a length of 12 mm., is very widely spread in 

 Africa, and also occurs in Asia ; its bite not only produces local 

 symptoms, but affects the general health more or less, a fact that 

 was already reported by Livingstone. 3 



[This tick is also known as the Tampan, and infests stock 

 as well as man. It has a leathery skin, broadly oval in form 

 and dull mud-coloured, and seldom reaches more than five-eighths 

 of an inch in length. It occurs abundantly in the Transvaal, in 

 Rhodesia, Bechuanaland, Cape Colony, German South-west Africa, 



1 Report of Government Entomologist for 1899, Cape of Good Hope, p. 33 (1900.) 



2 Gervais, P., Hist. nat. d. Insect apteres, 1844, iii., p. 462 ; Packard, A. G., " Arach- 

 nida " (U. States geol. surv. of the territ.), 1872, .p. 740; Neumann, G., 1896, p. 9. 



3 Audouin, Descr. de I'Egypte, 2nd edit., xxii., Zool., 1827, Explic. d. planch., 

 p. 426; Gerstaecker, A., " Gliederth. Ostafrika's von C. v. d. Deckens Reise," 1873, 

 p. 464; Murray, " Econom. Entomol.," 1877, * P- 182; Neumann, G., 1896, p. 26. 



