SYSTEM OF NATURE. 
105 ' 
entered into this subject at so great length in the ( Ento¬ 
mological Magazine,’ subjecting the segments, wings and 
mouth to a rigid investigation and comparison, I shall refrain 
from further detail. Lepidoptera, Hymenoptera and Or- 
thoptera, appear to be the subnormal, and Diptera, Cole- 
optera and Hemiptera, the abnormal classes ; and the 
relative position of the seven classes appears to be as under. 
HEMIPTERA. LEPIDOPTERA. DIPTERA. 
NEUROPTERA. 
ORTHOPTERA. HYMENOPTERA, 
COLEOPTERA. 
By a reference to the celebrated systems of Aristotle, 
Swammerdam, Linneus, Fabricius, Clairville and Latreille, 
founded on the wings, metamorphosis, mouth, or a combi¬ 
nation of these characters, and a sketch of which has 
been introduced in the present chapter, it will be seen that 
the above arrangement of winged insects is in harmonious 
accordance with them all. In the first place, a comparison 
with the alary system of Aristotle (p. 91) and Linneus 
(p. 94), will show that no two classes which these authors 
placed together are now separated. Secondly, the ciba- 
rian or maxillary (p. 96) makes the Hemiptera, Lepidop¬ 
tera, Diptera, and a portion of the Neuroptera, haustellate; 
while the remainder of the Neuroptera, together with all 
the Ortlioptcra, Hymenoptera and Coleoptera, are mandi- 
