174 Second Report on Economic Zoology. 
GROUP E. 
SUB-GROUP 0 . ANIMALS WHICH CONCERN MAN AS 
CAUSING BODILY INJURY OR DISEASE TO AVILD 
ANIMALS IN THE PRESERVATION OF AVHICH HE IS 
INTERESTED. 
Grouse Disease. 
A communication was received from Mr. R. Munro Ferguson, M.P., 
regarding the great loss of money due to the disease in grouse. The 
following communication was sent to the Board on this subject. 
Regarding this subject Mr. R. Munro Ferguson may be informed 
that it is extremely improbable that Tapeworms are the usual cause 
of grouse disease. 
This was pointed out by Cobbold in 1869 ; he stated as follows : 
“ The idea of the grouse disease being due to the prevalence of cestoid 
entozoa was manifestly erroneous ; not only were the symptoms 
exhibited by the infested birds entirely at variance with such a 
notion, but the post-mortem appearances distinctly proved that the 
disorder was due to other causes.” 
Now and again there is no doubt, however, that birds succumb 
to these parasites when present, as they often are, in very large 
numbers. 
It is possible that certain Nematode worms cause still greater 
mortality, but both kinds do not seem to account for the deatli rate 
entirely as far as our scanty information tells us. 
Very little is known concerning the internal parasites of game 
birds ; for instance, six worms only are recorded from black and red 
grouse, whilst over forty occur amongst domesticated poultry. 
The species found in the two kinds of grouse are the following : — 
Xematoda. — Ascaris compar , Schrank (in both kinds). 
„ Ascaris vesicularis , Froelich, in Red Grouse. 
„ Trichosoma longicolle, Rudolph, in Black Grouse. 
Cestoda. — * Drepanidotaenia infundibul if or mis. 
„ * Fimbriaria calva , Baird. 
„ Davainea urogalli, Modeer. Tania turneus, Mehlis? Tania 
microps , Diesing? 
„ Davainea circumvallata, Krabbe. Tania linea , Rud. Tania 
pluriuncinata ? 
„ Davainea calva , Baird. 
'the two species marked with an asterisk are doubtful. 
