ANALOGIES OF THE HEMIPTERA. 113 



the type of the last tribe, the genus ALEYRODES of La- 

 treille ; distinguished from all others, by undergoing a 

 complete metamorphosis ; and in other respects so much 

 of a lepidopterous insect, that both Linnaeus and 

 Reaumur placed it within that order. The whole may 

 be arranged in the following manner : 



Analogies of the HEMIPTERA. 



(ill.) It is a remarkable fact, that all the orders of the 

 Ptilota exhibit one primary division which is rapacious, 

 that is, preying upon other insects, as the lions and tigers 

 among quadrupeds, and the falcons among birds. The 

 universality of this law is manifest in every order 

 above named ; and the Hemiptera, as a whole, being 

 the raptorial order of the circle of the Ptilota, so the 

 Cimicides are the pre-eminent types, standing at the 

 head of their own order, and consequently representing 

 it. The Cicades have such an acknowledged resem- 

 blance to the Lepidoptera, that many authors have ac- 

 tually thought they passed into each other, without the 

 intervention of any other group ; so that, were it not for 

 the remarkable structure and metamorphosis ofAfeyrodes, 

 we should be disposed to place some of the aberrant 

 Cicades in that rank we now assign to Aleyrodes. The 

 whole of the Lepidoptera, and the Cicadides also, are 

 herbivorous; or, at least, never touch animal substances; 

 for both live on the juices or nectar of plants, in their 

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