CtASSIFICATION OF INSECTS. 245 



reproduction without union of sexes for many 

 generations. Aphis, 



802. Moth-blights {Aleyrodites). Larva oval, 

 flat, and scale-like. Pupa changes within the 

 skin of larva ; is quiescent. Imago with the 

 antennas filiform, conspicuous and six-jointed ; 

 wings equally developed, both as to length and 

 breadth, covered with a white, mealy substance 

 like the scales of Lepidoptera ; legs of uniform 

 structure, not formed for leaping. Sits on the 

 under-side of the leaves of the plants on which 

 the larva feeds. Aleyrodes, 



