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CLASSIFICATION OF INSECTS. 



Fleas or Pulicites. Larva long, slender, wormlike and 

 without feet, composed of thirteen segments, the last having 

 two hooks ; inhabits the young of quadrupeds and birds, 

 particularly of pigeons in a domesticated state, on the blood 

 of which it probably feeds. Pupa quiescent, necrombr- 

 phous, changes in a little silken cocoon, in which it remains 

 from eleven to sixteen days. Imago with the antenna; 

 many-jointed, usually concealed in cavities of the skull, 

 but capable of being erected at the pleasure of the insect ; 

 the parts of the mouth are nearly as in Dij)tera ; eyes sim- 

 ple ; legs long; tarsi five-jointed. Inhabits all countries, 

 sucking the blood of man and animals. Pulex. 



