606 CATALOGUE OF 



and to Pacbytelus, the latter a genus of CEdipodidse ; the great size 

 of their wings is fitted for long flights when the wind is favourable. 

 The afEiiilies of the genera 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 Barnevjlle. lu like manner the 

 CEiiipodida; 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 Parahormeiica, Para- 

 nauphcEta and Paraphoraspis, to indicate the resemblance between 

 them and the genera Hormetica, Nauphceta and Phoraspis. 



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



]. Trybliophorus. 



B. Maxillary palpi cylindrical. 



a. Eyes oval, slightly prominent. 

 * Cresl ol ilie prothorax high, much compressed, 

 t AiitenniE short ; apical jiiinl long, furrowed above. 2. Teratodes. 

 ft Antennae long; apical joint simple, 

 f Prosteriial spine acute, entire. - - 3. Monachtdium. 



XI Prosternal spine notched. - - - 4. Dericorys. 



** Ciest of the prothorax of moderate height, 

 f Head small. ------ 6. Tftanacris. 



ft Head large. 

 + Hind wings long, spotted. - - - - 6. Tropidacris. 



XI Hind wings shorter, not spotted. - - 7. Lophacris. 



*** Prothorax not crested, 

 •j- Prothorax not three-keeled. 

 X Prosternal spine thick, oblique, generally curved and 



extending to the mesosternum. - - 8. Cyrtacanthachis.- 

 XX 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 tibite not dilated. 

 <■£» Eyes not approximate. 

 -)- Keel of the prothorax conspicuous ; transverse impressed 



lines well defined. 

 = Third transverse line of the prothorax defined. 9. Acridium.- 



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

 -| — |- Keel (if the prothorax hardly defined, scarcely interrupted 



by the transverse lines. - - - - 11. Cantantofs.- 



-| — I — \- Prothorax with no keel _ . . ]2. Evnisacbis. 



u^upi Eyes appru.ximaie. 



IT Prosternal spine slender, acute, not oblique. 



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



AntennfP nearly as long as the body. 



