PREFACE 



This volume is printed in response to repeated requests 

 from members of my classes at the London School of 

 Tropical Medicine. Its aim is to provide, within convenient 

 compass, a general account of those Arthropoda that, as a 

 sequel to discoveries which have immortalised the names of 

 Manson and Ross, every medical and sanitary officer who 

 has to follow his vocation beyond the seas is now expected 

 to look out for, to recognise, and to endeavour to control. 

 It does not — or, at least, it is not intended to — trespass upon 

 the domain of the physician, of the pathologist, of the 

 sanitarian, or even of the protozoologist, but is chiefly con- 

 cerned with that entomological territory where these empires 

 meet. 



The literature of Medical Entomology — using the term 

 entomology in the old inclusive Latreillian sense — is now so 

 enormous that I neither could nor would compile a biblio- 

 graphy of the subject ; but the medical officer who is inclined 

 for this kind of entomological research will find in the list of 

 memoirs on pages 325-331 — many of which are richly furnished 

 with bibliographical appendices — something to set him on 

 his way. To these memoirs I gladly acknowledge my own 

 indebtedness, and I must also express my very great obliga- 

 tions to Mr E. E. Austen, of the British Museum, for the 

 kind and generous aid that he has given me, during several 

 years, in acquiring some practical experience of the species 

 of Diptera. 



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