lO. u 



rw^ 



Fig. 175. — Life Stages of the Bont Tick which produces Heart Water in sheeii (Lounsbury).* 

 la. Larva, natural size ; 1. Larva, enlarged four times ; the hair line shows its size when 

 distended with blood ; 2a. Nymph, natural size ; 2. Nymph, enlarged four times ; the 

 hair line as above ; 3a. Male adult, natural size ; 3. Male adult, enlarged four times ; 

 4a. Female adult, natural size ; i. Female adult, enlarged four times ; liair line as 

 above ; 5. LarvEe of ticks on stems of grass waiting for a host. 



* Beport of Governi 



DiQitized b 



nfent E: 



into! 



Microsoft® ,^ — 73- — — 



ologist, Cape of Good Hope, 1901. 



27—2 



