CLASSIFICATION OF INSECTS. 69 



The name of this order is from the Latin word 

 corrodere, to gnaw, and refers to the gnawing habits 

 of these insects. 



Order Mallophaga (Mal-loph'a-ga). 

 The £ird-lice. 



The fneinbers of this order are wingless parasitic in- 

 sects, with biting mouth-parts. The metamorphosis is 

 incomplete. 



The bird-lice are common on poultry and other 

 birds. They differ from the true lice in having bit- 

 ing mouth-parts, and in feeding upon either 

 feathers, hair, or the skin, while the true 

 lice have sucking mouth-parts and feed 

 upon blood. Fig. 45 represents a species 

 which infests poultry. 



The name of the order is from two 

 Greek words : mallos, wool, and phagein, 

 to eat. Although some species infest sheep 

 and goats, feeding upon their wool, by far 

 the greater number live among the feathers of birds. 



Order Euplexoptera (Eu-plex-op'te-ra). 

 The Earwigs. 



The members of this order have apparently four 

 wings ; the first pair of which are leathery, very small, 

 without veins, and when at rest meet in a straight line on 

 the back; the second pair are large, with radiating veins, 

 and when at rest are folded both lengthwise and cross-wise. 

 The mouth-parts are formed for biting. The caudal end 

 of the body is furnished zvith a pair of appendages which 

 resemble forceps. The m.etamorphosis is incomplete. 



These are long and narrow insects, resembling 



