PREFACE . 



Department of the Government of India, and to Sir Pardey Lukis, 

 Director- General of the Indian Medical Service, we are deeply indebted, 

 as without their encouragement and assistance the book could not 

 have been written. We have also to acknowledge the financial aid 

 received from the Indian Research Fund, which has enabled us to 

 offer the book at a lower price than would otherwise have been the 

 case. The Government of Madras have also rendered us substantial 

 assistance. To Surgeon-General Bannerman, of the Government of 

 Madras, we are indebted for much kindly encouragement. 



We have to express our thanks to the following authors for the 

 permission, so freely accorded us to reproduce illustrations which 

 have appeared elsewhere : Dr. Annandale (and also to the Trustees 

 of the Indian Museum), for the illustration of the external genitalia 

 of Phlebotomus ; Mr. Austen (and the Trustees of the British Museum), 

 for the drawings of Glossina palpalis and G. morsitans, Melophagus 

 ovinus, and the diagrams of the chaetotaxy of Glossina ; Dr. Gordon 

 Hewitt, for two drawings from his monograph on Musca domestica j 

 Dr. Graham Smith, for several drawings from his paper on the pro- 

 boscis of the Blow Fly ; Professor Miall, for four drawings from his 

 and Professor Denny's book on the Cockroach ; Professor Minchin 

 and Dr. Roubaud for the drawing of the internal anatomy of Glossina ; 

 Dr. Roubaud for the drawings, taken from his thesis, of the rep- 

 roductive organs of Glossina ; Professor Neumann, for the drawings 

 of some ticks and parts of lice ; Professor Newstead and Mr. Guy 

 Marshall, for the drawings of Phlebotomus papatasi and the external 

 genitalia of Glossina; Professor Oswaldo Cruz and Dr. Carlos Chagas 

 for the drawing of Conorhinus meglstus ; the Hon. N. C. Roths- 

 child, for the drawings of the heads of Ctenocephalus canis and 

 felis and the manubrium of the former ; Dr. Jordan and Mr. Roths- 

 child for the drawings of the external genitalia of Xenopsylla cheopis ; 

 and Dr. Wardell Stiles for drawings of the spiracles of some species 

 of Dermacentor. We are indebted to Mr. Austen for his kind offices 

 in procuring for us the drawings of Anopheles costalis and funestus, 

 and to Mr. Terzi for the admirable manner in which he has executed 

 them. 



In several instances the vagaries of the post have prevented our 

 receiving a reply to a request for permission to reproduce ; all draw- 

 ings, however, which are taken from other works are duly acknow- 

 ledged in the description of the plate on which they occur. We 

 would add our thanks to the publishers of the various papers in 

 B 



