RHIPICEPHA LINM 



711 



Dtagnostic Table of Genera, from Salmon and Stiles. 

 Rhipicephalin^. 



A. Eyes present: — 



I. Dorsal surface of capitulum hexagonal, sides drawn out 



laterally into sharp points. 

 [a) Males with anal plates. 



1. Second and third palpal segments straight; 



stigmata comma- shaped — Eurhipicephalus. 



2. Second and third palpal segments drawn out 



laterally into sharp points; stigmata round 

 — Mar gar opus, 

 (h) Males with rudimentary anal plates — Rhipicenfor. 



II. Dorsal surface of capitulum rectangular, sides straight ; 



male without anal plate — Dermacentor. 

 B. Eyes absent — HcBmaphysalis. 



Nuttall and Warburton's new classification of the Ixodidae is as follows : — 

 Prostriata. — Ixodidae with anal grooves surrounding the anus in front — 

 Ixodes. ' 



Metastriata, — Ixodidae with anal groove contouring the anus behind, but 

 this groove may be faint or obsolete. 



Brevirostrata.—- 



Group I. : Inornate without eyes, but with festoons — HcBmaphysalis. 

 Group IT. : Ornate or inornate with eyes, and with or without festoons 



Anal grooves marked. 

 Ornate with festoons. 



Basis capituli rectangular dorsally — Dermacentor. 

 Basis capituli hexagonal dorsally — Rhipicentor. 

 Usually inornate with festoons. 



Basis capituli usually hexagonal dorsally — Rhipicephalus. 

 Anal grooves obsolete. 



With short palpes — Margaropus. 



With , very short compressed palpes ridged dorsally and 

 laterally — Boophilus. 



Longirostrata. — 



Group I.: Ornate or inornate, with eyes and with or without festoons 

 basis capituli subtriangular dorsally. Male with a pair of 

 adanal shields — Hyalomma. 

 Group II. : Generally ornate, with eyes and with festoons, basis capituli 

 variable. Without adanal shields — Amhlyomma. 



Subgenus Aponomma chiefly found on reptiles with poorly- 

 developed or no eyes. 



It will be observed that the genera Eschatocephalus and Ceratixodes are 

 rejected and referred to the genus Ixodes. Another genus, Neumanniella 

 Lahille, 1905, is also rejected, and it is referred to Aponomma. 



Subfamily Rhipicephalin^. 



Eurhipicephalus Neumann, 1904. 



- Synonyms. — Rhipicephalus Koch, 1844 ; Phauloixodes Berlese, 

 1889. 



Rhipicephalinse with distinct eyes; base of the capitulum broader 

 than long; hexagonal, or dorsal surface forming a projecting angle 



