60(j ,'. CATALOGUE OF 



t and to Pachytelus, the latter a genus of (Edipodidae ; the great size 

 '. V)f 'tiheur! wikgs is filled 'for long flights when the wind is favourable. 

 * The' affinities 6f'l r ue' generk cannot be expressed by a linear arrange- 

 ment, but may be better represented by placing the groups in parallel 

 series as suggested by Brisout de Barneville. In like manner the 

 CEdipodidae and the Acrididae may be arranged in parallel series, and 

 this plan may be applied to the larger divisions of Dermaptera. 

 Brunner von Waltenwyl has observed the like analogies in the Blattidae, 

 and has given to some genera the names of Parahormelica, Para- 

 naupbceta and Parapboraspis, to indicate the resemblance between 

 them and the genera Hormetica, Nauphceta and Phoraspis. 



A. Fourth and fifth joints of the maxiliary palpi much dilated. 



1. TRYBLIOPHORUS. 



B. Maxillary palpi cylindrical. 



a. Eyes oval, slightly prominent. 

 * Crest of the prothorax high, much compressed, 

 f Antennae short; apical joint long, furrowed above. 2. TERATODES. 

 ft Antenna? long; apical joint simple. 



j Prosternal spine acute, entire. - - 3. MONACHIDIUM. 



Prosternal spine notched. - 4. DERICORYS. 



** Crest of the prothorax of moderate height. 



t Head small. ---_-. 5. TITANACRIS. 



ft Head large. 



J Hind wings long, spotted. - - - - 6. TROPIDACRIS. 

 J Hind wings shorter, not spotted. - 7. LOPHACRIS. 



*** Prothorax not crested. 

 f Prothorax not three-keeled. 

 | Prosternal spine thick, oblique, generally curved and 



extending to the mesosternum. - - 8. CYRTACANTHACRIS. 

 +J Prosternal spine straight, generally slender and not oblique. 

 Prothorax not compressed. 

 X Wings long. 

 o Prothorax not cylindrical. 

 -t- Fore border of the prothorax not notched. 

 - Hind tibiae not dilated. 

 ?i Eyes not approximate. 

 -f- Keel of the prothorax conspicuous ; transverse impressed 



lines well defined. 



Third transverse line of the prolhorax defined. 9. ACRFDIUM. 



= Third transverse line of the prothorax obsolete. 10. DIPONTHUS. 

 -\ |- Keel of the prothorax hardly defined, scarcely interrupted 



by the transverse lines. - 11. CANTANTOPS. 



-j \ f- Prothorax with no keel ... ]2. EYNISACRIS. 



Eyes approximate. 



Prosternal spine slender, acute, not oblique. 



Antennae much shorter than the body. - - 13. CALACRIS. 



Antennae nearly as long as the body. 



