PREFACE. 



The list of British Entomologists is again omitted, hut yet 

 the Vohime overflows. 



If, as we last year suggested, the list of Entomologists be 

 given once in three years, the season for it will recur next 

 Christmas. 



Dr. Hagen, during his stay in London, wrote a short 

 paper on Fossil Insects, which, as the subject is one but little 

 studied by Entomologists in general, we have given a pro- 

 minent position in the present Volume. Unfortunately, 

 whilsi Dr. Hagen was here he had not means of referring to 

 all his notes on the subject, and hence one or two important 

 errors have crept in, which will be found noticed in the 

 Errata, Dr. Hagen having fortunately detected them after 

 he reached home, and pointed tliem out to us just before 

 the publication of the Volume. 



For reasons to which it is unnecessary to refer more par- 

 ticularly, we have omitted our list of New British Coleo- 

 ptera in 1861 ; but our Index to the New British Coleoptera 

 in former Volumes has been kindly furnished by Mr. W. F. 

 Kirby. 



Mr. M'Lachlan's contribution of " Notes on British 

 Trichoptera" will be read with interest by all those who 

 regret, like ourselves, that so many orders should have suf- 



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