The nutritional needs of bees are supplied by nectar carbohydrates and by protein and other nutrients in pollen but little is known of how bees achieve nutritional balance. Using newly emerged caged worker honeybees (Apis mellifera scutellata), we investigated whether bees maintain their intake target when confined to pairs of imbalanced complementary diets varying in protein to carbohydrate (P...

African honey bees (Apis mellifera scutellata) dramatically changed the South American beekeeping industry as they rapidly spread through the Americas following their introduction into Brazil. In the present study, we aimed to determine if the management of European-derived honey bees (A. mellifera sspp.) could reduce the relative abundance of African-matriline drones at regional mating sites k...

The effects of octopamine, the main cardioacceleratory transmitter in insects, were investigated, in the isolated hearts of the honeybee, Apis mellifera macedonica, and the olive fruit fly, Bactrocera oleae. Octopamine induced a biphasic effect on the frequency and force of cardiac contractions acting as an agonist, with a strong acceleratory effect, at concentrations higher than 10(-12)M for t...

The type specimens of Tenthredo sensu lato deposited in the Hungarian Natural History Museum (Budapest) are reviewed. The following synonyms are recognized and discussed: Rhogogastera aenescens Mocsáry, 1909, syn. nov. of Tenthredo (Temuledo) finschi finschi W.F. Kirby, 1882; Macrophya prasinipes Konow, 1891, syn. nov. of Macrophya caucasica (Mocsáry, 1880); Tenthredo concinnoides Malaise, 1945...