IXODES 497 



[B. -Ixodince: Rostrum terminal. Body with dorsal shield over 

 some part of it. 



I. Rostrum and palpi longer than broad (Ixodce). 

 a. A groove around anus in front. 



Palpi caniculated in both sexes Ixodes. 



Palpiclaviform, not caniculated in the male; legs very 



long Eschatocephalus. 



Palpi claviform, not caniculated in the male ; anal groove 



absent in the female ... ... ... ... ... Ceratixodes* 



ft. A groove around the anus behind. 



No eyes ; adanal shields ... ... ... ... ... Aponomma. 



Eyes present. 



Males with no adanal shields Amblyomma. 



Males with adanal shields Hyalomma. 



II. Labium and palpi short; palpi not, or very little, longer 



than broad (Rhipicephalce}. 

 a. No eyes. 



Rostrum rectangular ; no ventral shields in the male ... Hcemaphy salts, 

 ft. Eyes present. 



No adanal shields, but usually with greatly developed 



coxae on fourth pair of legs. Capitulum quadrangular Dermacentor. 



Capitulum hexagonal Rhipicentor. 



Adanal shields in male. Stigmata comma-shaped ... Rhipicephalus. 



Stigmata oval or round ; legs normal ' ... Boophilus. 



Segments of legs expanded Margaropus. 



[The genus Ceratixodes of Neumann, 1902, occurs on birds. 

 [The genus Eschatocephalus of Frauenfeld, 1853, of which seven species are 

 known, is mostly parasitic on bats, and is found in holes, caves, and church towers. 



[The genus Aponomma of Neumann, 1899, is exotic, and almost entirely 

 confined to snakes and saurians. 



[The following are synonyms of the different genera : 

 Argas, Latreille, 1796 (Rhynckoprion, Hermann, 1804). 

 Ixodes, Latreille, 1795 (Acarus, Linnaeus, 1758; Cynorhcestes, Hermann, 



1804 ; Crotonus, Dumeril, 1822). 

 Ceratixodes, Neumann, 1902 (Ixodes, Cambridge, 1879 ; Hyalomma, Cambridge, 



1879). 



Eschatocephalus ', Frauenfeld, 1853 (Sarconyssus, Kolenati, 1857). 

 Amblyomma, Koch, 1844 (Ixodes, Latreille, 1795). 

 Hcemaphy salts, Koch, 1844 (Rhipistoma, Koch, 1844 ; Gonixodes, Duges, 



1888 ; Opitodon, Canestrini, 1897). 

 Rhipicephalus, Koch, 1844 (Acarus, Linnaeus, 1758; Ixodes, Latreille, 1795; 



Phanloixodes, Berlese, 1889; Boophilus, Curtice, 1890). 

 Dermacentor, Koch, 1844 (Ixodes, Latreille, 1795 5 Pseudixodes, Haller, 1882). 



F. V. T.] 



Genus. Ixodes, Latreille. 



Ixodes reduvius, L., 1758.* 



Syn. : Acarus reduvius and ricinus, L. ; Ixodes ricinus, Latreille, 1806. 

 The males are oval ; their length 1-2 to 2 mm. ; they are brownish- 

 red or black in colour ; the females are yellowish-red, 4 mm. long; 



1 Ixodes rediiviiis and /. ricinus are synonymous. [The above should read Ixodes ricinus, 

 Latreille, 1806. F. V. T.] 



