vi INTRO DUCTIO N. 



Brunner von Wattenwyl's "Revision du Systeme des Ortho- 

 pteres " published in the ' Annali del Museo Civico di Storia 

 Naturale di Genova,' series 2, vol. xiii. (1893), supplemented 

 by monographs of various subfamilies published elsewhere by 

 Brunner himself, de Saussure, Redtenbacher, and others. 



The Museum collections of Achetidce and Phasgonuridce were 

 arranged by Adam White in .1850, and rearranged by F. Walker 

 in 1869 and 1870, and have again been rearranged by myself 

 before and during the progress of the present Catalogue. 



W. F. KIRBY. 



Natural History Museum, 



South Kensington. 



November, 1906. 



