110 Classification 



Neumann (1907 a, p. 26), in his latest paper in which he deals with 

 classification, includes the following genera under the various sections 

 above mentioned : I. Ixodeae (Ixodes), II. Rhipicephaleae (Rhipicepha- 

 lus, Margaropus 1 , Hyalomma), and III. Amblyommeae (Amblyomma, 

 Dermacentor, Aponomma, Haemaphy sails). Lahille (1905, pp. 11 

 et seq.) places ticks in a suborder, Arpagostoma' 2 , comprising two 

 families : I. Argasidae, and II. Ixodidae ; he divides the latter into 

 three groups according to the <?s: Group 1. Anopli (without ventral 

 plates) including four genera: Aponomma and Neumanniella (eyeless 

 = anommata) and Amblyomma and Dermacentor (ommata); Group 2. 

 Artiopli (with an even number of ventral plates) including three genera : 

 Hyalomma, Rhipicephalus and Boophilus (all possessing eyes); and, 

 finally, Group 3. Perissopli (with five ventral plates), comprising three 

 genera : Ixodes, Eschatocephalus and Ceratixodes (anommata). Lahille 

 (p. 16) founded the genus Neumanniella, of which more presently, to 

 include Ixodes transversalis Lucas, 1844 ; 1845, p. 61, PI. I, Fig. 3 

 =* Aponomma transversale (Lucas) Neumann, 1899, p. 188, Fig. 42. 



Warburton (VII. 1907, p. 90) proposed the following classification: 



IXODOIDEA 



Argasidae Ixodidae 



i 



i 



Prostriata Metastriata 



, i 



Brevirostrata Longirostrata 



-U 



— I i 1 



Group 1 Group 2 Group 1 Group 2 



Argas Ixodes Haemaphysalis Dermacentor Hyalomma Amblyomma 



Omithodoros 3 Rhipicentor 4 Aponomma 



Rhipicephalus 



Margaropus 



Boophilus 



Among the Ixodidae he separated widely Ixodes from the other 

 genera as Prostriata, which refers to the anal grooves surrounding the 

 anus in front, whereas in all the other genera the anal groove curves 

 about the anus posteriorly. The latter are grouped under Metastriata, 

 and are divided into two sections : Brevirostrata and Longirostrata, 

 according as they possess a short or long capitulum; and each section 

 naturally falls into two groups, as indicated above. Banks (viii. 1907, 



1 Meaning Boophilus Curtice, and including Margaropus Karsch. 



2 Should be Harpagosloma (from harpagon = a grappling iron). 



3 We have not hitherto adopted the latinized transcription Ornithodorus but shall do 

 so henceforth in accordance with the rules laid down in The International Code of 

 Zoological Nomenclature. l Since added. 



