366 THE ANIMAL PARASITES OF MAN 



describing quite a different parasite. The name Ixodes ricinus, 

 Latreille, 1804, is now substituted by Neumann and Wheler. 



The synonyms given by Wheler are as follows : Reduvius, 

 Charleton, 1668 ; Ricinus caninus, Ray, 1710 ; Acarus ricinoides, 

 De Geer, 1778 ; Acarus ricinus, Linnaeus, 1788 ; Cynorhcestes reduvius, 

 Hermann. 1804 ; C. ricinus, Hermann, 1804 ; Ixodes megathyreus, 

 Leach, 1815 ; Ixodes bipunctalus, Risso, 1826 ; Cynorhcestes hermanni, 

 Risso, 1826; Crotonus ricinus, Dumeril, 1829; Ixodes trabeatus, 

 Audouin, 1832 ; T. plumbeus, Duges, 1834 ; I. reduvius, Hahn, 1834 ; 

 /. fuscus, Koch, 1835 (?) ; T. lacericz, Koch, 1835 (?) ; T. pustularum, 

 Lucas, 1866 ; /. fodiens, Murray, 1877 ; /. rufus, I. sulcatus, and 

 I. sciuri, Koch. F. V. T.] 



Ixodes hexagonus, Leach (1815). 

 Syn'. : Ixodes sexpunctatus , Koch, 1897 ; Ix. vulpis, Pagenstecher, 1861. 



Lives in the same manner as the foregoing ; has a predilection 

 for attacking hunting dogs, but does not spare other mammals or 

 even birds. The difference consists in the shape of the legs, the 

 shorter rostrum, and the larger size of the male. It also occa- 

 sionally attacks man, but is usually confused with the previously 

 mentioned species. 1 



[The synonyms of this species are as follows : Ixodes autumnalis, 

 Leach, 1815; Ixodes erinacei, Audouin, 1832; Ixodes reduvius, 

 Audouin, 1832 ; Ixodes crenulatus, Koch ; Ixodes erinxceus, Murray, 

 1877 ; Ixodes ricinus, Megnin, 1880. Two other synonyms are given 

 above by Braun. 



The female when fully replete is n mm. long, when fasting 

 3' 86 mm ; the shield is heart-shaped and punctate, body finely hair$ ; 

 palpi short and broad ; labium shorter, and tarsi of all the legs more 

 truncate than in Ixodes ricinus. The colour of the distended body 

 is drab and somewhat waxy ; rostrum, shield and legs light testa- 

 ceous. The male varies from 3*5 4^0 mm. long, and is reddish- 

 brown in colour with lighter legs ; the shield is punctate and leaves 

 a narrow margin around the body ; the body is elliptical, almost as 

 large in front as behind. There is a spine on the coxae of the first 

 pair of legs, which is shorter than in the male /. ricinus and longer 

 than in the female. The genital orifice is opposite the interval 

 between the second and third pair of legs. The fasting nymph is 



1 Neumann, G. L., cf. p. 129. 



