the natural Distribution of Insects and Fungi, 67 



These are the After a of Linnaeus, and comprehend three 

 classes, viz. Crustacea, Arachnida, and Ametahola, which 

 would be termed Radii by M, Fries. 

 2. True Insects, being all subject to that kind of metamorphosis 

 which has a tendency to give wings to the perfect or imago 

 state, but never more than six feet. 

 These are the Ptilota of Aristotle, and should, according 

 to M. Fries, be termed the Centrum of Annulose Animals. 

 " Sed centrum abit semper in duas series," and consequently 

 we find that the 



PTILOTA 



.A_ 



either become by metamorpho- or become by metamorphosis 



sis organized for mastication organized for suction in their 



in their perfect state, and are perfect state, and are the 

 the 



M A N D I B u L AT A of ClairviUe, Ha u st e l lata of Clairville, 



which comprise the following which comprise the following 



orders, viz. orders, viz. 



1. 1. 



Metamorphosis obtect. Metamorphosis obtect. 



Larvae cruciform. Larvae eruciform, 



Trichoptera? Lepidoptera. 



2. 2. 

 Metamorphosis incomplete, or Metamorphosis incomplete, or 



coarctate. coarctate. 



Larvae apod or vermiform. Larvae apod or vermiform. 



Hymenoptera. Diptera, 



K 2 3. Meta- 



