Abstract
Aedes aegypti laid 16 times as many eggs when fed defibrinated sheep blood as when fed washed sheep erythrocytes. A series of inorganic salts, a series of vitamins, and glucose, when added to sheep erythrocytes, failed to increase oviposition significantly. Several proteins and protein products were able markedly to increase oviposition in mosquitoes fed sheep erythrocytes. The proteins could be replaced almost completely by isoleucine but not by a combination of some 9 other amino acids. However, even when sheep erythrocytes were supplemented with the optimum concentration of proteins or isoleucine, oviposition did not equal that achieved with defibrinated sheep blood.