178 



Genus Ixodes 



graphy above given. The small numbers in brackets (2-11) accompanying the 

 following citations refer to the names under which the authors described the 

 species in the order given in the Synonymy ; where no number is given the name 

 /. hexagonus was used. 



1815. Leach, p. 397 ; p. 398 (2).— 1832. Audouin, p. 415 (3) ; p. 422 (4).— 

 1835-44. Koch, Heft 39. (5, 9).— 1844. Koch, p. 234; p. 233 (5, 9); 

 Walckenaer and Gervais, p. 240 ; p. 241 (2) ; p. 242 (3).— 1847. Koch, p. 23 ; 

 p. 22 (5, 9). — 1859. Gervais and van Beneden,p. 461 (2). — 1861. Pagenstecher, 

 p. 40 (6).— 1877. Canestrini and Fanzago, p. 184 (5) ; Conil, p. 28 (6) ; Murray, 

 p. 190 (3).— 1880. Megnin, p. 129(8).— 1882. Haller, p. 310 (3).— 1889. Berlese, 

 fasc. 55 ; Wheler.— 1890. Canestrini, p. 481 ; p. 500 (9).— 1891. Batelli, p. 78 ; 

 p. 81 (physiology of digestion) p. 98 (3). — 1892. Berlese, fasc. lxi. n. 10, descrip- 

 tion.— 1893. Railliot, p. 709.— 1899. Neumann, (a) p. 129; (6) p. 464.— 1900. 

 Ward, (a) p. 204 ; (b) p. 436 (but a few lines) ; Dubreuilh (occurrence on man). — 

 1901. Salmon and Stiles, p. 467.— 1904. Neveu-Lemaire, p. 152.— 1905. Mohler, 

 p. 15 (brief inaccurate description). — 1906. Wheler, p. 412. — 1907. Hunter and 

 Hooker, p. 55. — 1908. Banks, p. 31; Bonnet, 255 (11); Levendain (cited by 

 Blanchard).— 1909. Blanchard, p. 86. 



Male 1 (Fig. 171): L. 35 to 4 mm. (capitulum inch), W. 2 to 

 25 mm. (Nn.). Body oval, nearly as broad in front as behind. Scutum 

 long oval, marginal fold moderate. Faint, strongly divergent cervical 

 grooves. No lateral grooves. Three longitudinal posterior furrows (or, 

 at least, areas devoid of punctations). A pseudo-scutum faintly indicated. 

 Very numerous punctations. Venter finely punctate. Pregenital plate 



Fig. 171. I. hexagonus s : dorsum, venter, spiracle and tarsus 4. Specimen collected 

 in France by E. Simon, 1896. (Neumann coll. 719. Original, G. H.F.N, del.) 



1 The male is extremely rare : although we possess hundreds of females we have only 

 recently come into the possession of a male through the courtesy of Professor Neumann. 

 The specimen is from the same lot as that shown in Fig. 171, and was taken in the ForSt 

 de la Londe, Seine Interieure. We have recently (7. m. 1911) captured one male in a 

 hedgehog's nest near Cambridge. There are no males in the collections of the Museums 

 in London, Paris and Berlin. 





