Fig. 3.—Details of Tongue Structures of Bee. 
A, Under side of ligula; lp, labial palpus; r, r, rod; p, pouch; sh, sheath; 
gh, gathering hairs; b, bouton, or spoon. B. underlip or labium, with appen- 
dages, partly dissected—1, lora or submentum; a, a, retractor linguae longus; 
sr, salivavry duct; rb and b, retractor linguae biceps; mx, mx, maxiliae; Ip, 
Ip libial palpi; pa, paraglossa; gr, feeding groove; sh, sheath of ligula. C, D, 
and E, cross sections of ligula; hp, hyaline plate of maxilla; h, nairs acting 
as stops; mx, maxillae; lp, labial palpi; sd, side duct. F, cross section of 
extremity of tongue, near spoon—th, tactile hairs; r, rod; n, nucleus; gh, 
gathering hairs. G, cross section of tonue without gathering hairs, magni- 
fied 400 times; sh, sheath; b, blood space; t, trachea; ng, gustatory nerve; 
ed, central duct; sd, side duct; pm, plaited mambrane. H, same as G, but 
magnified 200 times, and with pm, plaited membrane, turned outwards, as in 
A; b, blood; n, nucleus; r, rod; h, closing hairs. I small portion of sheath; 
gh, gathering hairs; th, tactile hairs. K, extemity of tongue with spoon, 
lettering as before; b, branching hairs for gagthering. (From Cheshire by 
courtesy of L. Upcott Gill, London). 
