194 STUDIES IN INSECT LIFE, ETC. 

 more easily caught than healthy grouse ; their 

 flight is slow and limited in length ; they are said 

 to seek water ; the /' call " becomes feeble and 

 hoarse ; the feathers of the back and throat 

 lose their lustre and become ruffled ; the eye 

 is dimmed. But these external symptoms may 

 be associated with several diseases and diagnostic 

 of none. Nearly all of them occur in the two 

 diseases Coccidiosis and Strongylosis which, accord- 

 ing to the Inquiry; are responsible for a very 

 large percentage of deaths among grouse. 



Each of these diseases is caused by an animal 

 parasite, and the investigation of the parasites 

 attracted the attention of the scientific advisers 

 of the Inquiry from an early date. I am afraid 

 that in describing these organisms I shall have 

 to use some rather long words ; in extenuation 

 I can only say, slightly altering Captain Kedg- 

 ick's retort to Martin Chuzzlewit, " Well ! I 

 didn't fix the zoological language, and I can't 

 unfix it, else I'd make it pleasant." 



At the beginning of our Inquiry we knew 

 two internal parasites of the grouse (endopara- 

 sites) and two or three parasites which live 

 outside the skin (ectoparasites). At the present 

 time we know that grouse, like other animals, 



