VI 



1 N T \{ O D U CT I N. 



pnlilications vdhvd hy F. 10. Stliiil/.c, u\u\vv llic oen,.r;il title 

 of • Das Ticrrcich.' A rcviseil system of c-lassiru-ition, hy 

 K. W. VtM-horlV, was jiarlly skotduHl out in 1K02, in i)ai)ors in 

 till" ' Zoi>lo^Mscli(« An/.ci^'cr/ vol. xxv., and in llie ' Sit/un<i;s- 

 Iterifhto dcr Gi'scllsi-hart natnrl'orscluMiilor Freunde zu Berlin'; 

 hut it has hfen too incompletely developed to be taken into 

 consideration in the ju-esont work. 



Tiie HoUemhola and Thysaiinra have been included by some 

 authors \\itli the Ortho])tera, but are now usually regarded 

 either as small independent orders, or as aberrant families of 

 Neuroptera. 1 have therefore excluded them from the present 

 Catalo<xue, with the exception of the genus lapr/x (or Japjjx), 

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

 deceptively similar to Forficididce that 1 considered it almost 

 necessary to add them as an Appendix to that family. 



The small West-African genus Hetnimerus was originally 

 descril)ed by Walker as belonging to the GrijU'uhe [Achetidce), 

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

 ForjicuUdcK. 



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

 times called riursoria ; 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 important works 

 on the Orthoptera of Central America, especially ' Orthopteres 

 de FAmerique Moyenne : Blattides ' (1864) ; 'Synopsis des 

 Mantides Amcricaines ' (1871); and ' Eecherches Zoologiques 

 pour servir a I'histoire de la Faune de I'Amerique Centrale et 

 du Mexique/ 0'"'= partie (1870-1879). The latter work 

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

 also published a valuable series of synopses and descriptive 

 papers 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. (18G3-4), and in subsequent volumes. 



