SPECIES OF AMBLYOMMA 613 



10. Coxa I bidentate . . . -. . . . ' . . . ' . . 11 

 Coxa I with a single spur, body elongated, scutum with longitu- 

 dinal markings longirostra. 



(Brazil ; Venezuela ; Trinidad ) 



1 1 . Ventral surfaces of festoons not prolonged posteriorly . . . . . 12 

 Ventral surfaces of festoons prolonged by an entire membrane prolongatum. 



(South India ; Ceylon.) 



12. Scutum with marginal swellings, smooth or punctate , . . . . 13 

 Scutum with marginal swellings longitudinally striated . . triguttatum. 



(Australia.) 



13. Scutum without longitudinal postero-median dark bands 14 



Scutum with longitudinal postero-median dark bands . . . . . 17 



14. Scutum uniform brown ........ concolor. 



(Brazil ; Argentine.) 

 Scutum dark with light markings, or light with dark markings . . . 15 



15. Scutum dark with light markings ......... 1 6 



Scutum light bordered with brown clypeolatum. 



(West Indies.) 



16. Scutum with punctations, large, unequal, and covering the 



whole surface geayi. 



(Brazil ; Guava ; Columbia.) 

 Scutum without punctations in the centre, very few on the 



festoons sparsum. 



(Algeria ; French Guinea.) 



17. Scutum light at the sides marmoreum. 



(Cape Colony ; Mozambique; German East Africa ; Zanzibar; Congo; Senegal.) 

 Scutum dark at the sides ........... 18 



18. Scutum with very short fine punctations ..... hebraeum. 

 Scutum with large deep punctations, close together, and con- 

 fluent in parts loculosum. 



(Island of Cargados Carajos.) 



19. Coxa IV with a spur much shorter than the coxa . . . fossum. 



(Costa Rica ; Buenos Ay res.) 

 Coxa IV with a spine as long or nearly as long as the coxa . ovale. 



(Mexico.) 



20. Scutum with incomplete marginal groove (formed of puncta- 



tions or not contouring the posterior border) 21 



Scutum without marginal groove ......... 27 



21. Festoons not prolonged by a membrane ........ 22 



Festoons prolonged by a membrane ..... incisum. 



(Bolivia.) 



22. Coxa I with two long spurs striatum. 



(Brazil ; Paraguay.) 

 Coxa I with two short spurs . . . _ ; : ...... 23 



23. Scutum with marginal groove continuous 24 



Scutum with a light border, and marginal groove formed of 



. punctations . ... .... . . . . 26 



24. Body very straight, anteriorly with sub-rectangular sides . cuneatum. 



(Congo ; Uganda ; Togo Land ; Cameroon.) 

 Body broad with convex sides ......... 25 



