PHYLUM ARTTIROPODA 



337 



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

 (2) the extended classification, and arc 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 



I. Aptera 



II. Pseudoneuroptera 



III. Orthoptera . 



IV. Hemiptera . 



V. Neuroptera . 

 VI. Lepidoptera . 



VII. Diptera . . 



VIII. Coleoptera . 

 IX. Hymenoptera 



I Aptera . . . 



II Ephemerida . 



III Odonata . . 



IV Plecoptera 



V Isoptera . . 



VI Corrodentia . 



VII Mallophaga . 



VIII Thysanoptera 



IX Euplexoptera 



X Orthoptera . 



. XI Hemiptera 



XII Neuroptera . 



XIII Mecoptera 



XIV Trichoptera . 

 . XV Lepidoptera . 



f XVI Diptera . 



'I XVII Siphonaptera 



. XVIII Coleoptera . 



XIX Hymenoptera 



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 staphylinus (Fig. 

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

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

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



