CHIEF ENTOMOLOGICAL CLASSIFICATIONS AND SYSTEMS. 611 



of all the principles which should have guided him in his systematic 

 labours, and he thereby exposes their being untenable. Thus we find 

 in his next grouping, published in Cuvier's Regne Animal (Paris, 

 1817, 4 vol. 8vo.), the Insecta of Linnyeus again divided into three 

 groups, but these differently limited. The first, the Crustacea, has 

 received an addition in the order Tetracera, whereas the second, 

 Arachnides, is made to sacrifice not only this, but also the Myriapoda, 

 Thysanura, and Parasita, which are placed in the third group among 

 the Insecta. This also received a new order in the Strepsistera, 

 discovered and established by Kirby, so that it now consisted of twelve 

 orders. His next division (Families Naturelles du Regne Animal, 

 Paris, 1825, 8vo.) raises the Myriapoda, after Leach, to a distinct 

 class, and divides the Insecta into eleven orders, which remain as before 

 established: the Annulata collectively, which form Linnaeus' Insecta, 

 are here first called Condylopa. In the new edition of Cuvier's Regne 

 Animal (Paris, 1829, 5 vols. 8vo.) the class Myriapoda is again 

 reduced to an order among the insects, and their number again raised 

 to twelve orders, whereas in his latest system (Cours d'Entomologie, 

 Paris, 1832, 8vo.) they are again made into a class and placed between 

 the Arachnides and insects, the loss of which in the number of the 

 orders is made up by the establishment of Forjtcula as a distinct one. 

 The following is this system, which is the last published by its author : 



I. Apiropoda. Condylopes with more than six legs. 



1. Class. Crustacea. 



2. Arachnides. 



3. Myriapoda. 



II. Hexapoda. Condylopes with six legs. 



4. Class. Insecta. 



A. Insects without wings. 



a. Without metamorphosis. 



* With mandibulate organs. 1. Order. Thysanura. 



** With suctorial mouths. 2. Parasita. 



b. With a perfect metamorphosis. 3. Siphonoptera. 



B. Insects with wings. 



a. Elytroptera. The anterior wing 

 covers the posterior like a 

 sheath. 



u R 2 



