158 LLOVryS NATURAL EllSTORY 



useful to give a short sketch of the literature of Lepidopfera, 

 though it will be understood that I can only mention those 

 which I consider the most important and most useful books, 

 and I have had to leave unmentioned hundreds of others, 

 perhaps hardly less useful or interesting, which will be found 

 quoted in bibliographies and catalogues ; nay, in man) 

 instances, even in the present work. 



Languages. 



To begin at the beginning, I have already said that eighteen 

 languages at least are employed in entomological works at the 

 present day. They may be divided into five classes, as regards 

 Lepidoptera, though, with respect to some of the other orders 

 of insects, the classification would be rather different, as far 

 as the relative importance of some of the languages is 

 concerned. 



Class A. 



Languages of the first i?}ip07'ta?ice, in ic/iich every Entomologist 

 should endeavour to perfect himself. 



English. (Most important periodicals .• Publications of 

 the British Museum, and of the Entomological, Zoological, 

 and Linnean Societies ; Entomologists' Monthly Magazine ; 

 Entomologist ; Entomologist's Record ; Annals and Magazine 

 of Natural History ; Rothschild's " Novitates Zoologicae " ; 

 Zoological Record ; which last, together with Hagen's " Biblio- 

 theca Entomologica," published at Eeipzic in 1862, furnishes a 

 nearly complete index to the whole literature of Entomology 

 from the commencement of the study to the present day.) 



French. (Most important periodicals : Annales de la 

 Societe Entomologique de France; ditto, de Belgique ; 

 Annales de la Societe Linneenne de Lyon, &c.) 



