122 Veterinary Medicine. 



Female. — Coxse I with 2 equal spines. Male. — Scutum on 

 barely J^ width of back. S. America. /. Loricatus. 



Female. — Spine on Coxse I long, on postero-median angle. 

 Male. — Tarsi with dorsal protuberance near the tip. 



I. Hexagonus. 



Female. — I^ateral grooves of scutum slight. Punctations fine. 

 Male. — Scutum glabrous. Japan, Amoor. /. Ovatus. 



Female. — Coxse I without spine at postero-lateral angle. Male. 

 — Anal shield closed caudad. Congo. /. Rasus. 



Female. — Anal grooves reunited in a point posteriorly. Male. — 

 Anal shield nearly closed caudad. Australia, India. 



/. Holocyclus . 



Female. — Anal grooves distant posteriorly. Male. — Anal shield 

 horse shoe shaped. Africa. /. Pilosus. 



Male characters omitted in succeeding Ixodes. 

 Female. — First palpal article has strong horn directed forward. 

 S. America. /. Thoracicus. 



Punctations of scutum unequal, the larger near the margin. 



/. Diver sifossus. 

 Coxse I with small spine at post. lat. angle. S. America. 



/. Frontalis. 

 Tarsi with dorsal protuberance. U.S.A. ? /. Dentatus. 



Tarsi without dorsal protuberance. Ecuador. /. Fosulatus. 



Scutum with unequal punctations the largest near the pos- 

 terior border. Costa Rica (Felis Pardalis). /. Affinis. 

 Body provided with granulations. Madeira. /. Obscurus. 

 Body without granulations. N. Zealand. /. Precoxalis. 

 Coxse I with 2 subequal spines. /. Bifurcatus. 

 Coxse I with i long spine. Sumatra. /. Spinicoxalis. 

 Coxse I, smooth. Br. Columbia, Alaska, C. Horn. /. Putus. 

 Coxse with 2 small posterior tuberosities. N. Zealand. 



/. Eudyptidis. 

 Spine on Coxse I short, at post. lat. angle. N. Zealand. 



/. Intermedins. 

 Scutum with lateral grooves : Porose areas triangular. 



/. Angustus. 

 Scutum much broader than long. Tasmania, Mariana Is. 



/. Ornithorhynchi. 

 Coxse I unarmed. Tasmania. /. Tasmani. 



