162 



STATES OF INSECTS. 



Having, however, got the vantage-ground afforded by 

 this discovery of my friend, let us see if by standing upon 

 it we cannot get a tolerable generalization of the larvae 

 of all orders of insects that undergo a metamorphosis. 

 But first I must observe, that as in the perfect animals, 

 so in their larvae, the different groups are connected by 

 certain transition species, exhibiting characters common 

 to two or more of them ; and likewise that in many cases, 

 which you will see as we proceed, the analogy is as strong 

 or stronger between them and the Crustacea (and in a 

 few instances AracJniida, and even Mollusca) than the 

 Ametabola. My denominations, therefore, will be taken 

 from those tribes where the analogy appears to me the 

 most striking, and not from the Ametabola alone. 



I shall begin by drawing up for you a list of the Pri- 

 mary forms that I seem to have observed, and their cha- 

 racters ; and then going through the orders, shall give 

 you the examples of each, with such observations upon 

 them as the case may require. 



Primary Forms of Larvce. 



APTERA. 



Anopluriform. 

 Thysanuriform. 

 Chilopodiform. 

 Chilognathiform. 



ARACHNIDA. 



Araneidiform. 



CRUSTACEA. 



isopodiform. 



Onisciform. 



Idoteiform. 



Amphipodiform. 



Stomapodiform. 



Decapodiform. 



Branchiopodiform. 



MOLLUSCA. 



LlMACIFORM. 



ANNELIDA. 



Vermiform. 



Characters. 

 1. Anopluriform. Carnivorous; hexapod; antenniferous: 

 with a shortish oblong depressed body, and distinct 



