PREFACE. Vil 
Mr. F. Bootn, Mr. C. Otpnam, Mr. Wm. Evans, and others far too 
numerous to individually particularise, have rendered great and continu- 
ous services which have been from time to time acknowledged in their 
appropriate places and for which I here again express my indebtedness, 
while to others, as Mr. I. H. Srkes and Mr. J. F. Musuam, I am under 
exceptional obligations for their disinterested efforts to increase our 
knowledge of the range of various species by voluntarily undertaking 
special journeys and investigations into certain neglected portions of 
Europe and to some of the more remote and less-known islands and 
districts of our own country. 
Trusting that the present volume—the product of long and serious 
study, close and anxious research, and almost incessant application— 
will deserve and receive a continuance of that cordial appreciation, 
bestowed so unstintingly upon the previous volumes, and that the 
sympathetic encouragement and practical aid received in the past be 
continued in the future even more generally than heretofore. 
JOHN W. TAYLOR. 
North GRANGE, Horsrorta, 
Leeps, Nov. 23rd, 1914. 
