PREFACE 5 



a Cerceris by a Tachinid fly. The latter, turning out to be 

 a species new to Britain, forms the subject of a paper (23) 

 by Mr. C. J. Wainwright. Mr. Hamm also describes (24) 

 a new variety of the beetle Sitaris muralis. Commander 

 Walker's valuable notes on the most interesting British 

 Lepidoptera in the classical ' Dale Collection ' are recorded 

 in four papers (25-28), including the butterflies, and the 

 moths as far as the Noctuina. Two papers (29 and 30) 

 by Mr. W. J. Lucas give an interesting account of the 

 dragon-flies in the same great collection. Mr. F. C. Wood- 

 forde describes (31) a new form of the British Geometrid 

 moth Ephyra pendularia, and Commander Walker adds 

 a second supplement (32) to his valuable list of the beetles 

 of the Oxford district. 



Numerous extracts from the * Proceedings of the Ento- 

 mological Society of London' for 1908 and 1909, arranged 

 in order of date, are divided into three periods (33-35). 

 The subject of each communication has been defined with 

 much care in the Contents, so that any further description 

 is here unnecessary. It will be observed that the majority 

 of the communications and exhibitions were of bionomic 

 interest. 



This volume of Reports includes neither Mr. Marshall's 

 nor Dr. Dixey's papers on Reciprocal Mimicry in the 

 'Transactions of the Entomological Society of London'. 

 I have been hitherto prevented by other work from taking 

 my part in this controversy, but hope that a paper of mine 

 may appear side by side with those mentioned above, in 



