1. CSIRO Division of Entomology; G.P.O. Box 1700 Canberra City A.C.T. 2601 AUSTRALIA
2. USDA-ARS-Honey-Bee Breeding, Genetics and Physiology Research; 1157 Ben Hur Road Baton Rouge LA 70820 USA
3. Institute of Plant Sciences; Department of Agriculture and Rural Affairs; Burnley Gardens, Swan Street. Burnley Victoria 3121 AUSTRALIA