152 



INSECT PESTS OF FARM, GARDEN AND ORCHARD 



If the nests of the small brown ant* so common in corn-fields 

 infested with the root-aphis, be broken open during the winter, 



FIG. 129. The corn-root aphis (Aphis madidi-radicis Forbes): fl, wingless 

 vivaparous female; a, apex of abdomen; 2, antenna of same; 3, pupa; 

 4, winged vivaparous female; 5, antenna of same. (After Forbes.) 



many of the little black aphis eggs, which have been carefully 

 stored by the ants, will be found. They are a glossy black color, 

 oval in shape, and will sometimes be found in small piles in the 



* Lasius niger Linn. var. americanus Emery. See Forbes, Bulletin 131, 

 Illinois Agr. Exp. Sta. 



