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These summer forms are known as the stem mothers or agamic females.

Stem-mother: in plant lice; that form hatching from the winter egg, which starts a series of agamic summer generations.

These institutions may perhaps come to be training stations of a new-old type, the agamic or even agenic woman, be she nut, maid—old or young—nun, school-teacher, or bachelor woman.

Common apple aphis showing a winged and wingless agamic summer forms at a and c, one with wing pads formed at b, and a recently born young at d.

Budding: applied to that form of agamic reproduction found in plant lice.