publication of " Jwinean " Genera of Hymenoptera. 349 



of Panzer's actual language, but we believe it represents 

 fairly the thesis which he is maintaining.) 



This Essay, then, to which the secondary Title really 

 refers, is a sort of Apologia — minimising the differences 

 between Jurinean and Fabrician methods, and showing 

 that no one need feel any scruple or difficulty in using the 

 former, so long as he retains his belief in the essential 

 " naturalness " of the latter. 



The rest of the book is mainly occupied with classifying 

 the Hymenoptera previously figured and described by Panzer 

 without order in the Plates of Fn. Ins. Germ. It only 

 professes, as did the Fauna itself, to deal with German 

 species. These are now arranged under Fabrician Generic 

 names for the most part, but now and then with a 

 Jurinean Genus upheld as a convenient receptacle for 

 species which it was difficult to bring under Fabrician 

 categories, or mentioned as synonymous with some section 

 of a Genus, indicated by Fabricius, but not yet provided 

 by him with a name of its own. 



The Fabrician Genera of Krit. Rev. are, however, no 

 longer taken solely from Ent. Syst. Fabricius in 1804 had 

 revised his own classification and nomenclature in a new 

 work dealing with Hymenoptera only, the Systema Pieza- 

 torum. It is this revised list of Genera which Panzer now 

 adopts, and it is into these revised Fabrician Genera that 

 he tries as far as possible to fit the species known to him, 

 and often figured and described by him in the past under 

 names which Fabricius once used but has now abandoned. 

 In short the Syst. Piez. 1804 is to the Krit. Rev. 1806 

 exactly what Ent. Syst. 2. 1792 was to Fn. Ins. Germ. 1793- 

 1798, the source of its nomenclature, and the ultimate 

 authority to which all enquirers are to be referred. There 

 is, however, this difference in the situation — that Panzer 

 has now undertaken not only to cite Generic names, but 

 to distinguish Genera. And he has also a more difficult 

 task before him than in 1793-8 : (a) because he has to 

 reconsider a previous nomenclature to which he had com- 

 mitted and accustomed himself, part of which is to be 

 retained, and part abandoned; to do which he must 

 ascertain for himself what Fabricius's recent changes in his 

 nomenclature really amount to; (6) because he now re- 

 cognises that some of the Jurinean Genera deserve names of 

 their own, with which Fabricius apparently has not provided 

 them; {e) because \n the Fn, Ins, Germ, of the preceding 



