ENTOMOLOGICAL SYSTEMS. — LATREILLE. 
e. Tsopoda. 
2. Entomostraca. 
Jf. Branchiopoda. 
g. Peecilopoda, 
Xyphosura. 
Siphonostoma., 
h. Trilobites. 
II. ARACHNIDZ. 
Pulmonarie. 
Araneides. 
Pedipalpi. 
Tracheariz. 
Pseudo-Scorpiones. 
Pycnogonides. 
Holetra. 
Phalangium. 
Acarides, 
191 
IIL. Insecta. 
Myriapoda. 
Chilognatha. 
Tulus. 
Chilopoda. 
Scolopendra. 
Thysanura. 
Lepismide. 
Podure. 
Parasita (Anoplura Leach). 
Pediculus. 
Siphonaptera. 
Pulex. 
Coleoptera. 
Orthoptera. 
Hemiptera. 
Neuroptera 
Hymenoptera. 
Lepidoptera. 
Bhipiptera. 
Diptera. 
(244.) It must be remembered that, although this 
system is by Latreille, it forms part of the Régne 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 :— 
Clairville. Linneus. 
1. Elytroptera. Coleoptera. 
: 2. Deratoptera. Orthoptera. 
1 Mandibulata. 3. Dictyoptera. Neuroptera. 
< 4. Phleboptera. Hymenoptera. 
Etaop a 5. Halteriptera. Diptera. 
Bea Haustellata, 6. Lepidoptera. Lepidoptera. 
7. Hemimeroptera. Hemiptera. 
A ros Haustellata. 8. Rophoteira. 
Wineleak Mandibulata. 9. Pododunera. 
