448 SYSTEMATIC ARRANGEMENTS OF INSECTS. 



Sir Everard Homes Classification. 



MeTAMORPHOCtENOA, 



Having the embryo produced from an egg which is formed in the 

 ovarium, subjected to transformation, and breathing by air-tubes 

 (spiracula) ; heart wanting ; blood white . 



1. The embryo developed from eggs attached imder the tail. 



Lobster (Cancer). 



2. The embryo developed fi'om eggs carried upon the anterior feet. 



Spider CAranea). 



3. The embryo developed from eggs deposited under the cuticle of 



the skin or stomach. Gad-fly (QSstrus). 



4. Embryos developed from eggs for several generations, impreg- 



nated at the same time. Plant-louse {Aphis). 



5. Embryos, produced from eggs of one mother, that compose the 



whole republic. Bee (Ajyis). 



6. Embryos from eggs deposited under water. The water-moth 



(Phryganea). 



The Eclectic, or Modern: System. 

 M. Clairville appears to have first conceived tlie idea of 

 uniting the principles of several of the preceding systems, 

 an idea which has been followed up by Latreille, Dr. 

 Leach, and Mr. Stephens. 



Clairville' s Classification. 

 I. Winged Insects (Pteropliora). 



1 . With jaivs ( Mandibulata) : — 



a, With wing-cases (Ehjtropiera). 



b. With coriaceous wings (Deratoptera). 



c, With netted wings (Dictyoptera). 



d. With veined wings (Phlehoptera). 



2. With suckers (Haustellata) : — 



a, Wings with poisers ( Halter iptera). 

 h, Wings powdery (Lepidoptera). 



c, Wings partly opaque and partly translucent ( Hemimeroptera ) , 

 II. Wingless Insects (Aptera). 



1. With a sucker (Haustellata). 

 AVith a sliarp sucker (Bophoptera). 



2. With jaws (Mandihulata). 



With legs formed for running (Pododunera). 

 Latreille' s Classification.* 

 I. Insects with more than Six Feet, and without Wings 

 (Myriapoda). 



1. With many jaws— \fOod-l'ice (Chilognatha). 



2. W ith maH?/ /eei— millepedes (Chilopoda). 



* Regne Animal, 8vo. Paris, 1829. 



