( Ixxix ) 



can be expected to prove a " walking dictionary," familiar with the 

 contents of every page of the books under his charge. The 

 student must arm himself with a reference. Let us see how this 

 can be best obtained. 



First and foremost comes Hagen's ' Bibliotheca Entomologica,' 

 as a list of authors and titles of books and papers down to 180-2. 

 That this work is not on tiie shelves of every working entomologist 

 is a marvel to me, and it is still more a marvel that I find those 

 who possess it do not always avail themselves of the analytical 

 " Register " at the end of the second volume. 



Then there is the ' Catalogue of Scientific Papers compiled by 

 the Royal Society,' an enormous uiideitaking, embracing Science 

 as a whole, and of which a second supplementary volume is now 

 in course of preparation. 



I may mention also that two volumes of a new edition (edited 

 by Dr. 0. Taschenberg, of Halle) of Carus and Engelmann's 

 ' Bibliotheca Zoologica ' have lately appeared. 



Furthermore there is the invaluable ' Zoologischer Anzeiger,' 

 published fortnightly, giving a classified list of very recent papers 

 and books on Zoology ; and ' Naturae Novitates,' published monthly 

 by Friedliinder und Sohu, the enterprising Berlin firm of book- 

 sellers, should not be forgotten. 



But something more than the names of authors and the titles 

 of their productions is usually necessary ; a minute analysis is 

 required. For this purpose there are now three distinct channels 

 of reference, and it nmst be very extraordinary if the student fail 

 in this case to find the information, be it positive or be it negative, 

 he is in search of. 



In order of priority the 'Bericht fiber die wissenschaftlichen 

 Leistungen im Gebiete der Entomologie,' commonly known as the 

 Bkricht, takes the first place. Although foreshadowed to a 

 certain extent, it commenced in the year 1840 by an analysis of 

 the work done in 1838, and continues to appear now, as originally, 

 in Wiegmann's ' Archiv fiir Naturgeschichte,' and also separately. 

 With it are associated names honoured in Entomology — Erichson, 

 Schaum, Gerstacker, Brauer, Berlkau. This publication took 

 the initiative in iurnishnig a comparatively ready clue to entomo- 

 logical students in search of a reference, and in its earlier years 

 the difiiculties that beset the recorder, or compiler, must have 

 been far greater than those now existing. 



