OF DERMAPTERA. 113 



This last genus has a striking likeness to a withered leaf. 



Dasyposoma, Daihinia and Totnonotus have heen found in North 

 America ; all the rest are limited to Central America. 



16th. North America. 



Hapithus Anabrus Orchelimum 



Cycloptilum Orchesticus Ephippigera 



Udeopsylla Cyphoderris Polysarcus 



Tropidischia Neduba Tragocephala 



Camptonotus Marsa 



The species of the four first of the above genera are mostly dwellers 

 in caves. The European genera, Caloptenus, (Edipoda and Stenobothrus 

 are well represented in North America. 



ON THE AEKANGEMENT OF DERMAPTERA. 



The name Dermaptera, given to these insects by De Geer, has the 

 right of priority ; they were afterwards called Orthoptera by Olivier. 



Three large groups, represented by Forficula, Mantis and Phasma, 

 are not included in this Catalogue. 



Serville arranges the typical genera in the following order: — Forficula, 

 Blatta, Mantis, Phasma, Gryllus, Locusta, Acridium. 



Burmeister places them in the following series: — Blatta, Mantis, 

 Phasma, Acridium, Locusta, Gryllus, and excludes Forficula, to which and 

 to its relations he gives the name Dermaptera. Fischer de Waldheim also 

 excludes Forficula, and places the others in the following order: — Blatta, 

 Mantis, Phasma, Gryllus, Locusta, Acridium. 



Fischer likewise removes Forficula (for which he adopts the name 

 Labiduroidae, Dumerit), and arranges the rest in the following order, which 

 he terms ascending : — Blatta, Mantis, Phasma, Gryllus, Locusta, Acridium. 

 Scudder has noticed the various systems of authors who have written on 

 the Dermaptera, and adds his reasons for arranging the typical genera in 

 the following descending order, or in a series from the most highly 

 organized to those which are lowest in the scale: — Gryllus, Locusta, 

 Acridium, Phasma, Mantis, Blatta, Forficula. I prefer the system of 

 Fischer, who considers Acridium to represent the highest group. 



