to ON THE CLASSIFICATION OF INSECTS. ] 



found in forms, we may proceed with a degree of certainty ; and when forms ai-e correctly ; 



defined, we may escape most of the graver errors in the formation of groups. 



I do not propose to enter into the details of the principles of classification in this place, 

 but shall proceed at once to the modes which have been proposed and followed by the 

 principal English entomologists. 



The first classification is that of Stephens, in which the first grand division of the insect 

 kingdom is into two subclasses : 



. FIRST SUBCLASS : MANDIBULATA. SECOND SUBCLASS : HAUSTELLATA. j 



Older 1. Stkepsiptkra. Order 1. Hemipteba. \ 



2. Okthopteka. 2. Homoptera. \ 



8. Nedboptera. 3. Lepidopteba. . '■ 



4. Dermapteba. 4. Dipteea. 



5. Tbichoptera. 5. Homaloptera. j 



6. Hymenopteea. 6. Aphanipteba. ! 



7. Apteea. ] 



■| 



Insects are classed by Westwood in the following manner : ^ 



FIBST SUBCLASS : DACNOSTOMATA. SECOND SUBCLASS -. ANTHOSTOMATA. '] 



( Month with jawi.) ( Mouth with a sucker.) ' 



Order 1. Hymenopteba. Order 1. Dipteea. • 



? Osculant Order Strepsipteba. Osculant Order Homaloptera. i 



Order 2. Coleopteba. I 



Osculant Order Euplexopteba. Osculant Order Aphanipteba. 



Orders. Obthopteea. Order 2. Hetebopteea (including the water- | 



? Strepsipteba? bugs). I 



Order 4. Neceoptera. Order 3. Homopteea. j 



? •  i 



Order 5. Tbichopteea ( Phryganea alone). Order 4. Lepidoptera. ; 



