21 





*,-&^ 



Fig". 18. Hemiptera. Melon aphis. 

 (a) winged female ; (aa) enlarged antenna of same ; (ab) dark female, 

 side view, sucking juice from surface of leaf; (b) young or larva ; 

 (c) last stage of nymph ; (d) wingless female. All greatly enlarged. 



{From U.S. Dept. Agric.) 



