“…This includes physical harassment of reproductive workers (Foster and Ratnieks, 2001b, Monnin and Ratnieks, 2001, Sakagami, 1954, Visscher and Dukas, 1995, Dampney et al, 2002, and, more commonly, the selective removal of worker-laid eggs (Endler et al, 2006, Foster and Ratnieks, 2001b, Ratnieks and Visscher, 1989. In the presence of effective policing, attempts to lay eggs are futile, resulting in functional worker sterility (Wenseleers et al, 2004a, Wenseleers et al, 2004b.…”