Bionomics ofBombus (Fervidobombus) Morio2. Body Size and Length of Life of Workers

Abstract
Workers in the colony under observation were classified into three groups according to behaviour: foragers, house-bees, foragers, house-bees. Measurement (of wing length) showed that house-bees and foragers/house-bees were smaller than most foragers. The mean length of life was 72·6, 69·7 and 36·4 days for house-bees, foragers/house-bees and foragers respectively. The survival curves were convex for house-bees and foragers/house-bees and concave for foragers.