GARDEN INSECTS 



271 



the legs and antennae are pale whitish-yellow, and the rather 

 long, tapering honey-tubes are jet black. The winged 

 female has black spots along the sides of the abdomen. In 

 the South this species is also a serious pest of young cotton. 

 No true sexual forms or eggs of this species have been ob- 

 served, but reproduction by agamic females goes on through- 



FIG. 193. The melon aphis (Aphis gossypii Glov.)- (After Chit- 

 tenden, U. S. Dept. Agr.) 



a, winged female; aa, enlarged antenna of same; ab, dark female, side view, 

 sucking juice from leaf; 6, young nymph; c, last stage of nymph of winged form; 

 d, wingless female greatly enlarged. 



out the summer as with other aphides, winged forms ap- 

 pearing whenever the food-plant becomes overcrowded. 



Control. Much the same remedies may be used for all of 

 these species. Spraying with contact insecticides will destroy 

 most of them, but the aphides must be hit to be killed, and 

 spraying must be done while the plants are small and before 



