32 CLASSIFICATIOX. 



other Hexapods, lie seems to have been mainly in- 

 fluenced by the absence of metamorphoses. 



Cuvier, on the contrary, regarded them as true 

 insects, and arranged them as the second order, pre- 

 ceded by Myriapoda, and followed by the Parasita. 



Von Siebold does not adopt the order Thysanura, 

 but considers that the two families of Leinsmidce and 

 Pod'uridce, together with the Pediculidoi and Nifinidce, 

 form the order Aptera, which he regards as the first 

 among the true Insects, the Myriapoda forming, in his 

 system, part of the Crustacea. 



Burmeister, in his ' Handbuch der Entomologie,' 

 treated the Thysanura as a separate tribus, which he 

 placed between the Mallophaga and Orthoptera. 



According to Bourlet, the Thysanura follow the 

 Myriapods, and constitute the first order of insects. 

 Macleay classed them with the Myriapods, and Lice 

 among his Ametabola. 



Lucas adopted Laporte's name of " Monomorphes " 

 for the Thysanura, and placed them between the 

 Myriapods and the Anoplura. 



M. Gervais, in the ' Histoire Naturelle des Insectes 

 Apteres,' points out the great diversity which exists 

 between the Le]jismid(e and the Podnridce. Referring 

 to the classification of Fabricius and Blainville, who 

 placed the Thysanura amongst the Neuroptera, he 

 says, " Les Thysanoures ainsi envisagees sont done des 

 Nevropteres frappes d'un arret de developpement. C'est 

 ce que nous admettons parfaitement pour les Lepismes 

 et genres voisins, mais il nous parait impossible d'en 

 dire autant, on du moins dans le meme sens, pour les 

 Podures. Le petit nombre des anneaux du corps des 

 Podurelles les rapproche des Lisectes epizo'iques, et le 

 reste de leur organisation differe completement de celle 

 des Lepismes. B serait done plus convenable de creer 

 a leur intention un ordre particulier parmi les Insectes 

 hexapodes, dont le corps n'a pas le nombre normal 

 d'anneaux. Nous laisserons a cet ordre des Podures 

 et des Smynthuresle nom de Podurelles, c'est a dire qui 



