542 



Genus Haemaphij sails 



From the time egg is laid to emergence of larva 



Larva hardens 



Larva stays on host 



Metamorphosis : Larva to Nymph 



Nymph hardens 



Nymph stays on host ... 



Metamorphosis : Nymph to Adult 



Adult hardens 



Adult 9 stays on host ... 



Gorged ? drops from host and waits before laying 



123 days 



Relation of H. leachi to disease. 



H. leachi occurs all over Africa, and wherever it occurs it is the 

 carrier of a very fatal disease in dogs knoAvn as canine piroplasmosis or 

 malignant jaundice. The relation of the tick to this disease and the 

 pathology, parasitology and treatment of the malady, are fully treated 

 in the following papers, the titles of which will be found in Biblio- 

 graphies I and II of this work : 



Nuttall, 1904, pp. 219-257 ; 1905, pp. 12-32 ; ix. 1908, pp. 513-526. 

 Nuttall and Graham Smith, vii. 1905, pp. 237-249 ; 1906, pp. 536-651 ; 

 1907, pp. 232-272; x. 1908, pp. 243-260; ix. 1909, pp. 211-214, 

 215-228. Nuttall and Hadwen, vii. 1909, pp. 156-191; ix. 1909, 

 pp. 229-235. Nuttall, x. 1913, pp. 302-320. Many of these papers 

 are illustrated. 



Haemaphysalis concinna. 



The only observations on the biology of this species are by Brumpt 

 in France, who has kindly supplied me with his MS. notes thereon. 



Brumpt has found the adults only upon deer, attached in the 

 cervical region, especially along the mane, occasionally at the base of the 

 ears, and rarely elsewhere. When placed experimentally upon dogs, 

 they attached themselves anywhere. The sexes are found attached 

 close together upon deer. Nymphs and larvae were found by Brumpt 

 on deer and hedgehog and it is probable that they occur on other 

 mammals ; they attach themselves anywhere upon the hosts mentioned. 



