502 THE ANIMAL PARASITES OF MAN 



is attacked, but sheep and goats suffer most. Only one generation 

 appears to occur each year. The male is almost black with a pale 

 marginal stripe; the replete female brown with irregular light blue 

 stripes. It is abundant in parts of South Africa.] 



Genus. Haemaphysalis, Koch. 

 Haemaphysalis punctata, Canestrini and Fanzago, 1877 1878. 



Syn. : Hcsmaphysalis sulcata, Canestrini and Fanzago, 1877 1878 '> Rhico- 

 cephalus e.tpositicius, Koch, 1877 ; Hccmaphysalis peregrinus, Cambridge, 1889 ; 

 Herpetobia sulcata, Canestrini, 1890. 



[This species does not appear to be common. It occurs on sheep, 

 goats, horses and cattle. I have seen a female taken from man in 

 Britain. The female when fasting is 3*44 mm. long, when gorged 

 12 mm. long. Colour, reddish-brown, leaden-grey when gorged; 

 dorsal shield deeply indented in front ; rostrum, shield and legs 

 brownish ; body finely punctate, both above and below ; sexual 

 opening opposite the coxae of the second pair of legs in both sexes. 

 Palpi a little longer than the labium ; first segment short and narrow, 

 second and third widened on the dorsal face. Coxae with a short, 

 broad blunt spine ; tarsi short, terminated with a spur on the first 

 pair. The male is 3*10 mm. long, Body rather narrow, yellowish 

 to reddish-brown ; dorsal shield nearly covers the whole body; 

 numerous punctures over the whole surface. Eleven indentations on 

 the posterior margin of the body ; peritremes lighter in colour, large 

 and comma-shaped. The three anterior pairs of legs with a short 

 spine on the haunches, the fourth with a very long one directed 

 backwards. The nymph varies from 2-5 to 3*0 mm., is oval, and 

 light yellow to dark red in colour. Dorsal shield rounded with few 

 punctations. No spur on tarsi, and sexual orifice nearly obsolete. 

 Larva short and oval. Length i'2o mm. F. V. T.] 



Genus. Dermacentor, Koch. 

 Dermacentor reticulatus, Fabricius, 1794. 



Syn. : Acarus reticiilattis, Fabr., 1794; Ixodes reticulatus, Latreille, 1806; 

 /. niarnwratus, Risso, 1826. 



This tick is provided with eyes, but it is distinguished from Ixodes 

 and analogous genera by the lack of the abdominal plastron in the 

 male, which measures 5 to 6 mm. in length by 3-5 mm. in breadth. 

 The female may attain 16 mm. in length and 10 mm. in breadth. 

 It is found in the South of Europe, in Asia, and in America; 

 it attacks chiefly oxen, sheep and goats, and occasionally man. 1 



1 Neumann, G. L., " Rev. de la fam. des Ixodides," Alem. Soc, Zool. France, 1897, x, p. 360. 



