360 



PERCY SLADEN TRUST EXPEDITION 



IXODID^. 



The only ticks in the collection were taken from a Fox-terrier at Mah^ and belonged 

 to the species Rhipicephalus sanguineus (Latr.). This species, being more especially a 

 dog-parasite, has penetrated to most of the fairly warm regions of the world. Its original 

 home was probably Africa. It is known to be one of the conveyors of canine piro- 

 plasmosis. 



(Four species of ticks, collected by the Expedition in the smaller islands which were 

 visited, were recorded by Professeur L. G. Neumann in the Trans. Linn. Soc, ZooL, ser. 2, 

 vol. XII., pp. 193 — 6. Of these the above mentioned Rhipicephalus sanguineus (Latr.) 

 was obtained on Cerf Island, Providence. This is an uninhabited island only occasionally 

 visited by fishermen from an island, 15 miles away, on which there are no dogs. It is, 

 however, a great breeding place for birds, from which we supposed the ticks to have 

 come. J. S. G.) 



EXPLANATION OF PLATES 17, 18, AND 19. 



