320 



3. Nymph - (a) On an animal - Time I weeks 



() On earth second 



moult takes place - 8 



4. Adult - On host ; copulation 



takes place - I 



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 $ . 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 



= (H aemalastor) a sub-genus of Ixodes. Eyes 

 wanting. Rostrum long. Palpi piriform and not 

 grooved in $ , claviform or flat in ? . Anal grooves as in 

 Ixodes. Stigmata circular in both sexes. Legs very 

 long. Dorsal and Central chitinous thickenings in the 

 male ; fine grooves in the female. They occur on bats 

 and in caves. 



