Sladen, F. W. L., 1911.—How pollen is collected by the social bees, and the part played in the process by the auricle. British Bee Journal, vol. 39, pp. 491-493, Dec. 14.
Sladen, F. W. L., 1912.—(a) How pollen is collected by the honey bee. Nature, vol. 88, pp. 586, 587, Feb. 29.
1912.—(b) Further notes on how the corbicula is loaded with pollen.
British Bee Journal, vol. 40, pp. 144, 145, Apr. 11.
1912.—(c) Pollen collecting. British Bee Journal, vol. 40, pp. 164-166,
Apr. 25.
1912.—(d) How propolis is collected. Some further notes on
pollen-collecting. Gleanings in Bee Culture, vol. 40, pp. 335, 336, June 1.
1912.—(e) Hind legs of the worker honey bee. Canadian Bee Journal,
vol. 20, p. 203. July.
Wolff, O. J. B., 1873.—Das Pollen-Einsammeln der Biene. Eichstädt Bienen-Zeitung. 29 Jahrg. Nrs. 22 u. 23, pp. 258-270.
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