into two Classes. clxxxiii 



Pupa necromorphous NECROMORPHA. 



Wings normal, naked Hymenoptera. 



Fore wings abnormal, coriaceous ; hind 



wings normal, folded Coleoptera. 



Pupa isomorphous ISOMORPHA. 



Mouth mordent, with transversely mov- 

 ing jaws Orthoptera. 



Mouth with its component parts setiform, 



fitted only for imbibing fluids Hemiptera. 



Pupa various ANISOMORPHA. 



Pupa isomorphous Neuroptera. 



Pupa necromorphous Stegoptera. 



The following additional characters of the two new classes are of- 

 fered in further elucidation of their distinguishing differences ; and it 

 may be observed that they are subject to occasional exceptional mo- 

 difications. 



NEUROPTERA, Newm., non Linn. 



Larva hexapoda ; agilis ; mordens; Ephemeris, Agrionibus, Libel- 

 lulis, Perlis, aquatica, rapax, entomophaga; Termitibus, Psocis, 

 Thripibus, terrestris vel arborea, plerumque phytophaga. 



Pupa propemodum isomorpha ; hexapoda ; agilis ; natat, currit, 

 vorat. 



Imago larvam plus minusve simulans ; alis 4 amplis, membraneis, 

 nudis, paribus ; Ephemeris, Agrionibus erectis ; Libellulis por- 

 rectis ; mandibulis corneis, plerumque validis, mordentibus. 



STEGOPTERA, Newm., non Bum. 



Larva hexapoda; segnis; mordens; Phryganeis, Corydalibus, aqua- 

 tica, ? phytophaga ; Myrmeleonibus, Hemerobiis terrestris vel 

 arborea, rapax, entomophaga. 



Pupa necromorpha ; pellicula- Ugata ; sine ore, sine motu ; neque 

 natat, nee currit ; folliculo serico diu quiescit. 



Imago larvam nullo modo simulans ; alis 4 amplis, membraneis, 

 plerumque hirsutis, paribus, neque erectis, nee porrectis, sed 

 convolutis ant decumbentibus, corpus tegentibus, instar tecti ; 

 mandibulis plerumque corneis, plerumque mordentibus. 



A few additional observations may serve still further to illustrate 

 the differences between the two classes. In the first place, the meta- 

 morphosis is decidedly different : the pupa in the Neuroptera is uni- 

 formly locomotive and feeding, in the Stegoptera uniformly quiescent 



