Abstract
A diet consisting of drone honey bee brood provided an adequate nutrition for larvae of an aphidophagous coccinelid, Harmonia axyridis PALLAS. These beetles, however, could not grow on the diet lacking a fraction which is hot-water soluble, cationic and not adsorbed on active charcoal. A defined mixture of minerals could substitute for this fraction. The mineral requirements for the larval growth of the beetle wre thus elucidated and shown to be substantial, especially for potassium.
