14 



Order Mallophaga — This order includes the bird-lice; these are 

 wingless parasitic insects, with biting mouth-parts; their meta- 

 morphosis is incomplete. 



Order Hemiptera — This order includes the bugs, lice and others. 

 The winged members have four wings, but the lice and some 

 others are wingless; the mouth parts are formed for sucking; 

 the metamorphosis is incomplete. 



Order Diptera — This order includes the flies, among which are the 

 mosquitoes, bot-flies, the sheeptick, and many others. The 

 winged members have only two wings; the mouth-parts are 

 formed for sucking; the metamorphosis is complete. 



Order Siphonaptera — This order includes the fleas; the members 

 of it are practically wingless, the wings being represented only 

 by minute early plates; the mouth-parts are formed for sucking; 

 the metamorphosis is complete. 



Phylum MOLLUSCA 



Not discussed in this course. 



Phylum CHORDATA OR VERTEBRATA 



Not discussed in this course. 



