ENTOMOLOGICAL SYSTEMS. LATREILLE. 



191 



e. Isopoda. 

 2. Entomostraca. 

 /. Branchiopoda. 

 g. Pcecilopoda. 



Xyphosura. 



Siphonostoma 

 h, Trilobites. 



II. ARACHNIDS. 



Pulmonariaa. 



Araneides. 



Pedipalpi. 

 Tracheariae. 



Pseudo-Scorpiones. 



Pycnogonides. 



Holetra. 



Phalangium. 



A car ides. 



III. INSECTA. 

 Myriapoda. 



Chilognatha. 

 lulus. 



Chilopoda. 



Scolopendra. 

 Thysanura. 



Lepismidae. 



Podurae. 

 Parasita (Anoplura Leach). 



Pediculus. 

 Siphonaptera. 



Pulex. 

 Coleoptera. 

 Orthoptera. 

 Hemiptera. 

 Neuroptera 

 Hymenoptera. 

 Lepidoptera. 

 Rhipiptera. 

 Diptera. 



(244.) It must be remembered that, although this 

 system is by Latreille, it forms part of the Regne Animal, 

 and apparently stands under the name of Cuvier : the 

 latter, as we have already seen,, places the Annelides, or 

 red-blooded worms, in the same class as insects, thus 

 making the primary divisions four. We regret our 

 space will not permit a fuller elucidation of this sys- 

 tem,, which,, however defective in its primary groups, is 

 the most elaborate and the most perfect in its details that 

 has yet been given to the world. 



(245.) The system of Clairville is chiefly remarkable 

 for having given rise to the theory of dividing perfect 

 insects into the two great typical groups, as they are 

 thought to be, of Haustellata and Mandibulata. The 

 following table explains his primary divisions: 



