INTRODUCTION TO VOL, III. 



With this volume I complete my oeneral C^atalogiie of the 

 Order Orthoptera, of which Vol. I., containing the Forjiciduke, 

 JJemimeriihc, Blattidcv, Maid'u/ce, and PJiasm'uhe, was pul)lished 

 in 1904 ; and A^ol. H., containing the families Aclietidw and 

 Fhasgonurida', was published in 1906. The third volume, 

 containing the Locustidoi or Acridndce (the Short -horned 

 Grasshoppers or Migratory Locusts), is considerably larger 

 than the others, and has consequently occupied a longer time 

 in preparation. 



It had been intended to add an Ajipendix bringing the 

 Catalogue up to date ; but this was found to be impracticable, 

 except as regards the third volume ; for a (!ata]ogue so largely 

 facilitates work on the gionps of which it treats, that it speedily 

 grows out of date, and in many groups treated of in Vols. I. 

 and II. the amount of recent changes and additions has l)een 

 so large that nothing short of re-editing whole families would 

 be satisfactory. 



As regards Vol. I., Prof. A. N. Caudell published numerous 

 additions in the ' Proceedings of the Entomological Society of 

 AVashington,' vol. vii. pp. «!-««. The contents of this pajier 

 have been included in our Additions and Corrections (infra, 

 pp. 562-5G9), and various other omissions to Vols. I. and II. 



