The origin of the worker behavior in the bees-The investigation by the individuals of less reproductive capacity produced from the artificial rearing-

在岛根大学校园的温室中，饲养了一种双栖的、基本上是独居的蜜蜂，雌性Lasioglossum scitulum。人工巢穴也被用来操纵幼虫食物的数量，以人工地产生“更小”的雌性。温室的年生周期通常发生在小笼内。本研究采用新研制的人工巢，获得了体型较小的雌鸟。在育雏期间，体型较小的雌虫产生的细胞数量相对较少。

Females of a bivoltine, basically solitary bee, Lasioglossum scitulum were reared in the greenhouse at the campus of Shimane University. The artificial nests were also used to manipulate the amount of larval food to produce "smaller" females artificially. The annual life cycle occurred at the small cage normally in the greenhouse. By using the newly developed artificial nest in this study, smaller females were obtained. The smaller females produed relatively low number of cells during the brood rearing period.