JS* 



Fig. 3. Details of Tongue Structures of Bee. 



A, Under srde of ligula; Ip, labial palpus; r, r, rod; p, pouch; ah, 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, maxillae; 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 maxillai; h, hairs acting 

 as stops; mx, maxillae; Ip, 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; 

 cd, 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). 



