114 Ixodoidea 



Order Ricini Koch, 1844 ; also 1847, p. 5. Fiirstenberg, 1861, p. 208. Canestrini, 

 1890, p. 482. 



Genus Ixodes Gervais, in Walckenaer and Gervais, 1844, p. 229. 



Family Ixodida Kiichenmeister, 1855, p. 421. Kolenati, 1857, p. 19. 



Group Ixodides Nicolet, 1855 (cited by Michael, 1883-1887). 



Family Ixodidae Leach, in Gerstaecker, 1863, p. 343 ; 1873, p. 464. Murray, 

 1877, p. 185. Conil, 1877, p. 28. Kramer, 1877. Claus, 1880, p. 652. 

 Michael, 1883, p. 50. Berlese, 1885, p. 131. Ludwig, 1886, p. 612. Riley, 

 1887, p. 744. Marx, 1892, p. 232. Trouessart, 1892, p. 28. Neumann, 1892 b, 

 p. 94. Railliet, 1893, p. 631. Braun, 1895, p. 257. Osborn, 1896, p. 255. 

 Ward, 1900 (a), p. 193, and (6), p. 430. Neumann, 1901, p. 322. Stiles and 

 Hassall, 1901, p. 1. Neumann, 1904, p. 444. Lahille, 1905, p. 16. Wheler, 

 1906, p. 400. Pocock, 1907, p. 190. Donitz, 1907, p. 1. Neumann, 1907 a, 

 p. 26. Newstead, Dutton and Todd, 1907, p. 99. Bonnet, 1908, p. 247. 

 Blanchard, 1909, p. 80. 



Family Ixodides Donnadieu, 1875. Megnin, 1876 a, p. 293; 1877, p. 86; 1880, 

 p. 117 ; 1892, p. 25. Railliet, 1886, p. 495 ; 1895, p. 703. Neumann, 1888, 

 p. 82 ; 1892 a, p. 90 ; 1896, p. 1 ; 1897, p. 324; 1899, p. 107 ; and subsequently 

 to 1910. Blanchard, 1890, p. 322 ; 1909, p. 5. Brumpt, 1910, p. 510. 



Order Metastigmata Canestrini, 1892, p. 563. 



Suborder Cynorhaestea Marx, 1892, p. 233. 



Suborder Arpagostoma Lahille, 1905, p. 11. (Should be Harpagostoma.) 



Superfamily Ixodoidea Banks, 1894, p. 209. Salmon and Stiles, 1901, p. 383. 

 Warburton, 1907, p. 90. Banks, 1907, p. 62, and 1908, p. 7. Nuttall, 

 Warburton, Cooper and Robinson, 1908, p. 1 (Part I of this work). Castellani, 

 1910, p. 460. 



Superfamily Characters. Acari of the suborder Metastigmata 

 (the breathing apertures being somewhat posteriorly situated) charac- 

 terized by the possession of a movable false head, or capitulum, of a 

 special structure. It consists of a basal portion (basis capituli), a pair 

 of palps, protrusible chelicerae with digits serrate externally, and a rigid 

 hypostome almost always toothed on its ventral surface. All are blood- 

 sucking mites, parasitic on animals. 



N.B. The Acarina, or Mites, are divided into the suborders Vermiformia, 

 Astigmata, Metastigmata, Helerostigmata, Prostigmata, Notostigmata. 

 Besides the Ixodoidea, the Metastigmata include the Oribatidae and the GamaMae. 

 The only mites in the least likely to be confounded with the Ixodoidea are the 

 remarkable group of Qekobiidae, parasitic on lizards. Their mouth-parts strongly 

 resemble those of the ticks, but they belong to the suborder Prostigmata, having 

 their breathing orifices near the palps. 



The Ixodoidea are divided into two families, I. the Argasidae (see 

 Part I) and II. the Ixodidae. 



