1. Wigglesworth, V. B., “The Life of Insects,” Weidenfeld and Nicolson, London, 1964.
2. Warth, A. H., “The Chemistry and Technology of Waxes,” 2nd Edition, Reinhold Publishing Corp., New York, 1956, p. 76–121.
3. Ikuta, H., Analyst 56:430 (1931).
4. Roberts, O. D., and H. T. Islip, Ibid. 47:246 (1922).
5. Phadke, R. P., Bee World 42:149 (1961).