THE CANADIAN ENTOMOLOGIST. 261 



him ; positive in his convictions, with an almost unparalleled knowledge 

 of species and the widest possible acquaintance with their distribution. 



Dr. Rebel, young, active, prompt in decision and action ; fully 

 acquainted with modern methods and in full sympathy with them ; 

 appreciative of characters different from those traditionally used, open- 

 minded, yet equally positive in opinion. 



Two more divergent collaborateurs could scarcely be imagined, and 

 the introductory remarks by Dr. Rebel show how slowly the work 

 progressed and how nearly it was at times abandoned, owing to appar- 

 ently irreconcilable differences of opinion. That it was the younger man 

 who gave way in most cases appears plainly enough, and that in certain 

 directions the catalogue would have been much improved had he had his 

 way is also certain. 



To mention one case only : the addition of the citation of the place 

 of original description of the genera used, as desired by Dr. Rebel, would 

 have improved the usefulness of the "Catalog" immensely for the general 

 student. 



The rules concerning nomenclature laid down in the second edition 

 are approved and continued as a guide to the third edition. 



The Papilionidce at the beginning of the butterflies is familiar; but 

 the term Rhopalocera is lacking, and after the Pieridce we now have the 

 Nymphalidce instead of the Lyccenidee; which do not follow until after 

 the Libytheidce and Erycinidce. The Hesperiidce end this series as usual; 

 but we have now only VII. Families as against X., with 74 genera and 

 71*6 species, as against 44 and 456 of the previous edition. 



The term Heterocera is also abandoned, and series like " Bombyces" 

 or "Nocture" have ceased to exist. Instead of that, VIII., Sphingidce, 

 follows without comment after VII., Hesperiidce. It is a pity that in the 

 Sphingidce the Smerinthine series could not have been placed at the foot 

 as the more generalized, rather than Thyrcus, which is certainly more 

 specialized. 



Now comes an important change, when " IX. Notodontidce" replaces 

 the Sesiidce of the former edition and so X. Thaumctopocda>. and XI. 

 Lymantriidce, are unfamiliar ; though as Cnethocampa and Liparidcc we 

 had been used to seeing them elsewhere. XII. Lasiocainpidce, XIII. 

 Endromidcz, XIV. Lemoniidce, XV. Sat urui idee, XVI. Brahmaiidce, XVII. 

 Bombycidce, XVIII. Drepanidce, XIX. Callidulidce, XX. Thyrididce, 

 precede in order the XXI. Noctuidce. These latter are divided into 



