Ixodoidea. Ticks. iig 



Female. Male. Distribution Species. 



Punctations deep, 



none on margins nor 



mar^nal shields Nubia R. Compositus 



Marginal groove of 



shield double China R. Carinatus 



Dorsal shield smaller Very chitinous adanal 

 than in annulatus ; shields; tail; both Australia, 

 labium has 8 rows smaller than in de- Porto Rica, 

 teeth coloratus S.America^ R. Australis 



Legs and palpi short ; 



tarsi spurred (i sin- Four anal shields ; pos- 

 gle, others double) ; terior border 7 lobed ; 

 stigmate areas, sub- stigmate areas and 

 rotund, small spurs as in female Caucasus B. Calcaratus 



Hypostome with 10 Central, conical chiti- 

 rows of denticles, 5 nous tail ; adanal 

 rows on each half of shields dark brown Japan, Para- 

 hypostome projecting ; hairy guay R. Caudatus 



Salmon and Stiles separate from the above the forms Annulatus, 

 Decoloratus, Australis, Calcaratus and Caudatus on the strength 

 of the sharp, lateral points on the second and third palpal articles. 

 These constitute the genus Boophilus. 



They furnish the following 



KEY TO THB SPECIES OF THE GENUS BOOPHILUS. 



Fiery red spot anteriorly in the middle of the back of female ; 

 male without tail ; number of rows of denticles unknown. West 

 Indian. (Boophilus) Haemaphysalis rosea. 



Hypostome with 10 rows of denticles ; male with distinct horny 

 tail. Japan. (Boophilus) Rhipicephalus Caudatus. 



Male with distinct horny tail. S. Africa. 



(Boophilus) Rhipicephalus Decoloratus. 



Male unknown. A doubtful Buenos Ayres form. 



Male with distinct horny tail. Australia, India, Venezuela, 

 Cuba, Porto Rico. (B) Rhipicephalus Australis. 



N. American form (porose areas of female not united in median 

 line. Southern United States ; Mexico. 



(Boophilus) Rhipicephalus Annulatus. 



N. African form. (B) Ixodes Dugesii. 



Caucasus form (porose areas of female united in median line of 

 Capitulum. (B) Rhipicephalus Calcaratus. 



Genus H^maphysalis. 

 Generic characters : Eyes absent. Base of capitulum rectangu- 

 lar, twice as broad as long. Palpi conical, second article with 



