"In Maine the s deposit their over-wintering eggs on the common garden foxglove (' L.). Egg-laying in this locality begins late in September and extends through October the time varying somewhat with different weather conditions. The eggs hatch in the spring and the aphids of the first generation, wingless forms called "stem-mothers", seek shelter between the folded parts of the growing leaves. The stem-mothers are slow in their development and are about a month in attaining full growth. On reaching maturity they do not lay eggs but produce their young viviparously."