136 

 3. 



4. 



5. 

 6. 



9. 



10. 



11. 



12. 



13. 



14. 



15. 



16. 



17. 



18. 



Genus Ixodes 



[Dorsum showing two lateral folds . . .4 



| „ „ one „ fold . . .5 



(Anal grooves divergent ..... loricatus 

 ( „ „ convergent holocyclus 



(Anal grooves convergent . . . . .6 

 ( „ „ parallel or divergent . . .10 



(Anal grooves approaching but not uniting behind 7 

 { „ „ uniting behind. . . . .8 



| Anal plate oval, basis capituli with median point 



ventrally pilosus 



Anal plate racket-shaped, basis capituli tricuspid 

 ( ventrally schillingsi 



(Coxa IV with long internal spur .... cordifer 

 I „ „ without long internal spur . . .9 



(Tarsus 4 humped some distance from end . . rasus 



\ „ „ tapering ugandanus 



(A single distinct spur on coxa I . . . .11 

 (Two spurs or none 12 



(Median ventral plate about as broad as long . hexagonus 

 ( H ,, „ much longer than broad . ricinus 



Coxa I with two spurs ..... 13 



„ „ without spurs ; at most slightly pointed . 16 



(Both spurs very long and close together . . gigas 

 1 „ „ otherwise ...... 14 



(Both spurs short, subequal 15 



(Inner spur long and strong, outer short. . . boliviensis 



(Strong cornua ; anal grooves short, divergent . minor 

 (No cornua ; anal grooves long, parallel . . angustus 



jTarsi humped canisuga 



\ „ tapering 17 



(Coxae trenchant tenuirostris 



( „ not trenchant ...... 18 



Punctations very fine, equal .... cavipalpus 



„ unequal, nearly obsolete . . . rubicundus 



266 

 235 



221 



238 

 233 



228 

 230 



178 

 147 



203 



166 



164 

 195 



210 



246 



193 

 204 



