The mode of wetting the pollen is not clear. Wolff says it is done by an exudation from the tibia; H. Müller by admixture of nectar from the bee's mouth. The latter view is more probably correct.

[12]

In studying the proboscis the student will do well to take a Bombus as an example; its anatomy being more easily deciphered than that of the honey-bee.

[13]

Leuckart proposed the term lingula; but the word gives rise to the impression that it is a mistake for either lingua or ligula. Packard calls the part "hypopharynx."

[14]

For figures and descriptions of the proboscides of British bees, refer to E. Saunders, Jour. Linn. Soc. xxiii. 1890, pp. 410-432, plates III.-X.: and for details of the minute structure and function to Cheshire, Bees and Bee-keeping, vol. i.

[15]

Breithaupt, Arch. Naturges. lii. Bd. i. 1886, p. 47.

[16]