viii PREFACE. 



and 125 — some purchased and some lent ^Yith Mr Whitehead's 

 permission. From Dr Fleming's translation of Neumann's ' Para- 

 sitic Diseases of Domestic Animals,' figs. 4, 5, 13, 15, 16, 21, 28, 

 29, 30, 43, 45, 46, 115, 127, and 131 have been kindly lent by 

 translator and publishers. Figs. 1, 6, 39, 49, 50, 85, 128, 129, 134, 

 138, 139, 144, 145, 146, 165, 166, 167, 168, 169, 172, 188, 190, 209, 

 219, 224, are from Dr Nicholson's 'Manual of Zoology' ; figs. 1/, 

 20, 22, 23, 24, 47, 72, 73, 74, 78, 79, 80, 81, 82, 88, 119, 120, 126 are 

 original drawings by the author, the blocks being lent by the 

 S.-E. Agricultural College, from the College Journal. From Messrs 

 Churchill the foUowing figures from Chauveau's 'Comparative 

 Anatomy of Domesticated Animals' have been purchased— viz., figs. 

 148, 149, 150, 151, 155, 156, 158, 160, 161, 163, 175, 180, 204, 206, 

 207, 210, 211, 212, 21.3, 215, 216, 217, and 218. Fig. 159 has been 

 reproduced from the same work, with the pubhshers' permission. 



From Curtis's ' Farm Insects ' the following have been purchased, 

 figs. 55, 56, 65, 67, 77, 83, 84, 100, 103, 109, 113, 118, and 130. Fig. 

 153 is reproduced from one of Sir William Flower's drawings m his 

 ' Osteology of the Mammalia.' The figures of Eelworms, figs. 18 

 and 26, are reproduced with the permission of Professor Ritsema 

 Bos ; and fig. 94 is a reproduction from Miss Ormerod's ' Manual 

 of Injurious Insects.' The Department of Agriculture, U.S.A., 

 kindly allowed me to reproduce Dr Howard's figures of the San 

 .lose Scale, figs. 123 and 124 (part). Figs. 137, 170, 223 are from 

 the British Museum Guides. From Foster and Balfour's ' Embrj-- 

 ology' figs. 197, 199, 200, 201, 202, 203, 205 are reproduced, with 

 the permission of Professor Adam Sedgwick. 



Fig. 48 is reproduced from several figures in Neumann's ' Para- 

 sitic Diseases of Domestic Animals,' and also part of fig. 3. 



Figs. 121 and 135 are from 'Insect Life' (original), with the 

 permission of Messrs Methueo & Co. 



To all who have helped me in this work, by lending their blocks, 

 or allowing their figures to be reproduced, or by lending specimens, 

 I offer my thanks. 



F. Y. T. 



