vi T N T H () I) U (!T I ON. 



publications edited by F. E. Scliuize, under the oeiu'ral title 

 of ' Das Tierreich.' A revised system of classiiication, by 

 K. W. A^erLoetf, was partly sketched out in 1902, in ])apers in 

 the ' Zoologisclie Anzeiger/ vol. xxv., and in the ' Sitzungs- 

 berichte der Gesellschaf't naturforschender Freunde zu Berlin^; 

 but it has been too incompletely developed to be taken into 

 consideration in the present work. 



The C^ollemljola and Thysanura have Iteen included by some 

 authors with the Orthoptera, but are now usually regarded 

 either..as small independent orders, or as aberrant families of 

 Neuroptera. 1 have therefore excluded them from the present 

 Catalogue, with the exception of the genus lapyx (or Japtjx), 

 belonging to the Thysanura, the species of which are all so 

 deceptively similar to Forjiculidce that I considered it almost 

 necessary to add them as an Appendix to that family. 



The snrall West-African genus Hendmerus was originally 

 described by Walker as belonging to the Gri/Uklce (Achetidce), 

 but is now considered to form a distinct family allied to the 

 I'^orpcidida:. 



The Blattidce form a distinct section of the Orthoptera, some- 

 times called Cursoria ; but are not usually regarded as entitled 

 to the rank of a distinct order. 



Previous to the publication of the ' Biologia Centrali- 

 Americana,' De Saussure issued a series of iniportant works 

 on the Orthoi)tera of Central America, especially ' Orthoptcres 

 (le l'Ameri(|ne Moyenne : Blattides ' (18G4) ; 'Synopsis des 

 Mantides Americaines ' (1871); and ' Eecherches Zoologiques 

 pour servir a I'histoire de la Faune do I'Amerique C^entrale ot 

 du Mexique,' O'"*^ partic (1870-1879). The latter work 

 includes Blattida\ Mantidce, Pliasmidce, and Gryllidce. He has 

 also published a valuable series of synopses and descriptive 

 ])apers on various families of Orthoptera, especially on the four 

 families already mentioned, in various periodicals ; but chiefly 

 under the title of " Melanges Orthopterologiques," in the 

 ' Memoires de la Societe de Physique et d'Histoire Naturelle de 

 Geneve,' vol. xviii. (1863-4), and in subsequent volumos. 



