3 i8 
Third segment of palpi not long, etc., legs very 
long (p. 320) - Eschatocephalus (= Haemalastor) 
43 Legs not very long. Third segment of palp, long 
acuminate, extending beyond point of articulation of 
v fourth (p. 320) ----- Ceratixodes 
( Rostrum long (p. 326) - - - Hyalomma 
5 j Rostrum short ------ 6 
[ Stigmata comma shaped (p. 321) 
6j Eurhipicephalus (= Rhipicephalus) 
( Stigmata round (p. 323) Margar opus (= Boophilus) 
j Rostrum long ------ 8 
^ Rostrum short - - - - - -9 
gf Eyes present (p. 325) - - - Amblyomma 
1 Eyes absent (p. 328) - Aponomma 
Second segment of palp has a prominent lateral 
projection giving the palp a triangular or cresentic 
I appearance (p. 324) - Haemaphysalis 
Second segment of palp has not a lateral projection 
(b) Coxa IV, very large and characteristic in the 
\ male (p. 328) - Dermacentor 
/ Body flat, with thin edges, finely shagreened 
I (punctate) narrow in front (p. 330) - - Argas 
Body, thick sides, covered with warts (p. 328) 
\ Ornithodorus 
Genus Euixodes 
( = Ixodes \sensu strictiori ]).—Eyes absent. Palpi 
long ; hollowed on the internal surface in both sexes. 
Tarsi without terminal spurs. Anal groove surrounds 
anus anteriorly and opens posteriorly. Scutum in 
male does not cover the body laterally and posteriorly. 
Stigmata oval in S , circular in ? . Male ventrally 
covered with six shields ; two lateral, embracing the 
origins of the legs and the stigmata ; one median, 
