3 20 
3- Nymph - {a) On an animal - Time I weeks 
(b) On earth second 
moult takes place - ,, 8 „ 
4. Adult - On host; copulation 
takes place - „ 1 „ 
These periods vary with circumstances. The tick 
can fast for long periods at any stage, and can hibernate 
also at any stage. 
(2) Evi hexagonus is the European dog tick. 
Genus Ceratixodes 
(= a sub-genus of Ixodes ).—Palpi long : in $ 
inner surface not grooved so as to embrace the mouth 
parts. In $ , palpi (third segment) end in a conical spine 
( i.e ., acuminate), the fourth segment being inserted 
almost at the base of the former. In $ , third segment 
slightly grooved and the end slightly swollen. No eyes. 
No anal groove in 2 . In $ one anal shield, two adanal. 
Stigmata circular in both sexes. 
C. putus .—Found on sea-birds, and crawling about 
the cliffs where they breed. 
Genus Eschatocephalus 
= ( Haemalastor ) a sub-genus of Ixodes .—Eyes 
wanting. Rostrum long. Palpi piriform and not 
grooved in cf , claviform or flat in $ . Anal grooves as in 
Ixodes. Stigmata circular in both sexes. Legs very 
long. Dorsal and ventral chitinous thickenings in the 
male ; fine grooves in the female. They occur on bats 
and in caves. 
