vi INTRODUCTION, 



have been supplied. Corrections of synonymy have not been 

 included : these are often more or less conjectural or doubtful, 

 and would have required more time and labour to investigate 

 than could possibly be devoted to them. Nor have I attempted 

 to include all the species described under magazine genera, like 

 Blatta and Mantis, by the older authors, such as Gmelin and 

 Goeze, who often described species very briefly and imperfectly, 

 and sometimes based them merely on almost unrecognizable 

 figures in the works of Seba and other early iconographers. 



When any doubt seemed to exist in the identification of a 

 synonym, I have preferred to keep the names distinct for the 

 present. It is always easy to drop a superfluous name ; but if 

 a name representing a distinct species should be wrongly 

 rejected, the insect is likely to be renamed as new by the next 

 writer who notices it. 



In using my Catalogue, it will be necessary for Entomolo- 

 gists always to consult the ' Zoological Records ' published a 

 year or two before each volume, as well as those published since. 

 While the general arrangement is largely that of Brunner von 

 Wattenwyl's ' Revision du Systeme des Orthopteres ' of 1893, 

 the latest revisions of separate families or even genera have 

 been used to supplement it, especially those in the ' Biologia 

 Central!- Americana ' by Bruner. 



I may now make supplementary remarks on some of the 

 families included in Vols. I. and 11. 



FORFICULID^. 



Since the death of De Bormans, Dr. Malcolm Burr has 

 completely remodelled this group of insects. I have therefore 

 omitted any reference to it in my Additions and Corrections. 



Blattid^. 

 Since his return from Borneo, Mr. R. Shelford has specially 

 devoted himself to this family, and has revised and rearranged 

 many of the subfamilies which it includes. 



