NO. 14 SENSE ORGANS ON MOUTH-PARTS OF BEE— MdNDOO 



43 



then along the groove (fig. 7, Gv t ) to the place marked X on the 

 dorsal surface of the mentum (fig. 10). 



While eating honey and syrup greedily, the distal half of the groove 

 may be opened widely to the exterior so that the liquid may enter more 

 rapidly. Since there are no muscles in the glossa, the only way to ex- 

 plain the opening of the groove is by supposing that the blood rushes 



Ftp to— Diagram of sagittal section through head of a worker honey bee, 

 sliStly lateraUo Median line of head, pharyngeal plate P^/)ep iP harynx 

 (Ep) labrSm (L»), cervical plate (CvPl), mentum (M ), P a ^°fsa (FjO, 



E5W? ^ea^a^^ 



S mSles (Ma to M u ) attached to epipharynx, pharyngeal plate and walls of 

 phaTynx! Muscles marked M, and M 2 fold and unfold glossa respectively. For 

 other abbreviations see page 54. 



into this part of the tongue and the edges of the groove (fig. 3 A, Ed) 

 are widely separated by blood-pressure. In sections the rod (R) is 

 often everted to the outside of the tongue. 



