Plat 



mx 



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— I, Lora or Submentum ; a, a, Retractor LingiiEeLongus; 

 sd, Salivary Duct ; rb and b, Retractor Linguae Biceps ; mx, mx, Maxillae ; lp, lp, 

 Labial Palpi ; pa, Paraglossa ; gr, Feeding Groove ; sh, Sheath of Ligula. 

 C, D, and E, Cross Sections of Ligula — lip. Hyaline Plate of Maxilla ; ft, Hairs 

 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 Tongue without Gather- 

 ing Hairs, magnified 400 times— sh, Sheath ; b, Blood Space ; t, Trachea ; ng, Gusta- 

 tory Nerve; cd, Central Duct; sd, Side Duct; pm, Plaited Membrane. H, 

 same as G, but magnified 200 times, and with pro, Plaited Membrane, turned out- 

 wards, as in A.— 6, Blood ; m, Nucleus ; r, Rod ; h, Closing Hairs. I, Small 

 Portion of Sheath— gh, Gathering Hairs ; th. Tactile Hairs. K, Extremity of 

 Tongue, with Spoon, lettering as before— 6, Branching Hairs for Gathering. 



