ARGAS REFLEX US 369 



Other synonyms are as follows : Cynorhcestes pictus, Hermann, 1804 ; 

 Crotonus variegatus, Dumeril, 1829; Ixodes pictus, Gervais, 1844; Derma - 

 centor albicollis, Koch, 1844-47 ; Dermacentor pardalinus, Koch, 1844-47 > 

 D. ferrugineus, Koch, 1844-47 ; Ixodes holsatus, Kolenati, 1857; Pseudixodes- 

 holsatus, Haller, 1882 ; Hcsmaphsalis marmorata, Berlese, 1887. 



The female when fasting is 3-86 mm. long by 2 mm. wide. 

 The body is depressed, larger behind and reddish-brown in colour. 

 The shield is very large and extends to the level of the third pair 

 of legs, with a few large and many small punctuations, milky white, 

 variegated with reddish-brown. Sexual orifice opposite the coxae 

 of the second pair of legs. Coxae of the front legs are deeply 

 bifid, the others with a moderate spine. When gorged light 

 brown, and may reach 16 mm. When depositing eggs the female 

 is mottled with dark brown above and below. The male is like 

 the female. The shield is reddish-brown, variegated with a milky- 

 white pattern. Coxae of the fourth pair of legs three times the 

 size of the third. There is a sharp backwardly-pointing spine on 

 the second palpal segment, also seen (but smaller) in the female. 

 Length 4*20 mm. 



[According to Mr. Wheler this is a very variable species both 

 in size and colour. It occurs in England on sheep, but not com- 

 monly. It has probably been introduced into Britain. Besides 

 the animals mentioned above it is also found on deer. F. V. T.]. 



Rhipicephalus sanguineus (Latreille), 1804. 



Syn. : Ixodes sanguineus, Latr., 1804 ', Ixodes rufus, Koch, 1844 ; Rhipi- 

 cephalus limbatus, Koch, 1844; Rh. siculus, Koch, 1844; Rh. stigmaticus, 

 Gerstacker, 1873. 



Spread over almost the entire tropical and sub -tropical regions, 

 occurring in Europe in the South of France and in Italy ; it infests 

 dogs and more rarely sheep ; oxen, cats, foxes and human beings 

 are also attacked. 1 



Argas reflexus (Fabricius), 1794. 



Syn. : Acarus reflexus, Fabricius, 1794 ; Acarus marginatus, Fabricius, . 

 1794; Rhynchoprion columbte, Hermann, 1804. 



The Argasinae are distinguished from the Ixodinae by the head, which in 

 the former is situated on the inferior aspect of the cephalo thorax, while 

 in the Ixodinae it projects freely ; also by the very short proboscis, the 



1 Neumann, G. L., c. 1897, P- 3 8 5- 

 2 4 



