PREFACE. xi 



Portici, Italy, has made most extensive contributions 

 to our knowledge of the physiology and morphology of 

 the Coccidae, and I may also specially mention his 

 excellent monograph of the genus Aspitliotus. 



To the Royal Society, through Prof. E. B. Poulton, 

 F.R.S., I owe my heartiest thanks for their liberal 

 support in granting to me a sum of 20, which has 

 enabled me to explore many unworked localities, 

 thereby contributing in no small way to our knowledge 

 of the distribution of the indigenous species of the 

 British Coccidae, and the discovery of material of great 

 scientific value ; while to the Ray Society I am most 

 of all indebted for their unbounded generosity in 

 publishing the researches of my labours. 



My thanks are also tendered to Dr. L. 0. Howard, 

 United States Entomologist, for so kindly naming the 

 various Hymenopterous parasites of the Coccidae which 

 are enumerated in the text. 



To Mr. E. E. Green, Government Entomologist, 

 Ceylon, I am specially indebted for examples of his 

 types of British species, and also for a vast amount of 

 exotic material and papers. In England also to Mr. G. 

 Nicholson, Curator of the Royal Botanic Gardens, Kew ; 

 to Messrs. T. R. Hodges, A. J. Nixon, A. T. Gillanders, 

 Brockton Tomlin, Miss Tomlin, and Miss C. E. Tomlin, 

 for their unfailing interest in collecting material. 



To Dr. Karel Sulc in Bohemia for European species 

 and much valuable information concerning Signoret's 

 types; to Dr. Gustavo Leonardi and Prof. Antonio 

 Berlese, Portici, Italy ; to Profs. T. D. A. Cockerell, 

 J. H. Comstock, R. and C. H. Fernald in America; to 

 Dr. Morris, Commissioner of the Board of Agriculture 

 for the West Indies ; to Dr. W. W. Froggatt, Official 

 Entomologist of Sydney, New South Wales; to Mr. C. 

 F. French, Official Entomologist of Victoria, Australia ; 

 to the Rev. A. E. Eaton in North Africa; and Mr. C. 

 P. Lounsbury, Government Entomologist, Cape Colony, 

 I tender my warmest thanks for much valuable 

 material, types, and important papers on Coccidae. 



