PREFACE 



The seventh volume of Hope Reports contains publica- 

 tions of the appropriate octavo size that have appeared 

 between June 1908 and June 1910. But for the pressure 

 of work I should have brought out the volume at an earlier 

 date and in a more convenient size. 



Dr. Dixey's important Anniversary Address to the Ento- 

 mological Society, on the scent-distributing scales of male 

 Pierine butterflies, the summary of many years of laborious 

 investigation, heads the series of thirty-seven memoirs. 

 It is succeeded by seven papers (3-9) on the bionomics of 

 the Lepidoptera, chiefly concerned with mimicry in butter- 

 flies. All of these appeared in the ' Transactions of the 

 Entomological Society of London' in 1908 and 1909. 

 Mimicry in African butterflies is the subject of two papers 

 (3 and 5), including the Rev. K. St. Aubyn Rogers's im- 

 portant and fully illustrated memoir on British East African 

 examples (5), Mimicry in North American butterflies is 

 the subject of a third (4), while Mr. J. C. Moulton's interest- 

 ing and well-illustrated account of some of the chief 

 mimetic combinations in Tropical America is a fourth (6). 

 Dr. Longstaff's valuable memoir (7) contains a great 

 variety of bionomic observations on butterflies in many 

 parts of the world, while Mr. Guy A. K. Marshall's (8) and 



