PHYLUM ARTHROPODA 



337 



suited; these are known as (i) the condensed classification, and 

 (2) the extended classification, and are correlated in Table XII. 

 Because of the large number of orders space will permit only a 

 few words about each. Illustrations have been provided to 

 show the principal characteristics. 



TABLE XII 



> 



CONDENSED CLASSIFICATION EXTENDED CLASSIFICATION 

 ORDER ORDER 



COMMON NAMES 



Springtails, fish-moths. 



May-flies. 



Dragon-flies. 



Stone-flies. 



Termites or white ants. 



Book-lice, bark-lice. 



Biting bird-lice. 



Thrips. 



Earwigs. 



Grasshoppers, crickets, 

 cockroaches. 



Lice, bugs, plant-lice. 



Ant-lions, hellgramite 

 flies. 



Scorpion flies. 



Caddice-flies. 



Moths, skippers, but- 

 terflies. 



Flies, sheep-ticks. 



Fleas. 



Beetles. 



Ants, wasps, bees, saw- 

 flies, ichneumon-flies. 



Order i. Aptera. SPRINGTAILS AND FISHMOTHS (Figs. 

 259, 260). Insects without wings, probably descended from 

 wingless ancestors; biting mouth-parts retracted within the 

 cavity of the head; no metamorphosis. 



The very primitive living insect, Campodea staphylimis (Fig. 

 259), belongs to this order. The most common species is the 

 fishmoth, Lepisma saccharina (Fig. 260), \vhich lives on dry 

 starchy food such as book bindings and starched clothing. An- 



