"s are ecologically and economically important and, for a variety of reasons, have become ideal subjects for investigating many problems. These include problems of sensory perception during foraging (Spaethe and , 2001); recruitment communication among foragers (Dornhaus and Chittka, 2001; Domhaus and Cameron, 2003; Dornhaus et al., 2003), and the role of parasitism in the evolution of social behavior (Schmid-Hempel, 1998). Recent developments in artificial insemination of bumblebees (Baer and Schmid-Hempel, 2000) provide opportunities for understanding genetic influences on phenotypic traits."