segment of palpi has a well-marked lateral conical 
projection. Palp as a whole distinctly triangular or 
crescentic. Stigmata circularor comma shaped an¬ 
teriorly. Coxa I not cleft as in Eurhipicephalus. 
Coxa IV not enlarged as in Eurhipicephalus , but has 
a well marked spur. 
(1) H. leachi. —Second segment of palp has a 
sharp spine especially well marked in c? ; on the inner 
side eight bristles ; third segment has a strong hook ; 
fourth segment covered with numerous hairs. Hypo- 
stome four or five rows of teeth. 
8 . Scutum yellowish red, punctations regular and 
equal. Marginal furrow well marked. Venter white. 
Hind angles of rostrum sharply pointed. Coxae have 
short spines ; that on Coxa I the largest. 
? . Second palpal segment with sharp external 
angle. Scutum oval. Punctations regular, cervical 
grooves much prolonged posteriorly. Marginal grooves 
absent. Porose areas separated by their diameter. 
The South African dog tick. 
Pathogenicity. —Transmits P. canis. 
Bionomics. —It leaves its host for each moult. 
(2) H. flava. —The common goat, sheep, and 
buffalo tick of S. India. 
Genus Amblyomma 
8 . Eyes, generally flat, but not always conspicuous. 
Anal grooves as in Aponomma. Anal plates absent, but 
there are two pairs and one median chitinous platelet 
near hind border (Donitz). Rostrum long, behind 
almost rectangular, curving forwards to the narrower 
anterior portion. Palpi long. First segment very 
small, second long with four or five bristles, fourth in 
a pit on the underside of the third. Hypostome, three 
