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“passes round the tongue to the back, where its edges do not meet, but are continuous with a very thin plaited membrane (G, pm) covered with minute hairs. This membrane, after passing towards the sides of the tongue, returns to the angle of the nucleus, or rod, over the under surface of which it is probably continued. The rod passes through the tongue from end to end, gradually tapering towards its extremity, and is best studied in the queen, where I trace many nerve threads and cells. It is undoubtedly endowed with voluntary movement, and must be partly muscular, although I have failed completely in getting any evidence of striation. The rod on the underside has a gutter, or trough-like hollow (cd, the central duct) which is formed into a pseudotube (false tube) by intercrossing of black hairs. It will also be seen that, by the posterior meeting of the sheath, the space between the folded membrane (G, sd) becomes two pseudotubes of larger size, which I shall call the side ducts.

Fig. 85.—Head of honey bee, worker: a, antenna; g, epipharynx; m, mandible; mx, maxilla; mxp, maxillary palpus; pg, paraglossa; lp, labial palpus; l, hypopharynx; b, its spoon.—After Cheshire; from Bull. Div. Ent. U. S. Dept. Agr.