Tongue of the Worker Bee. 



Ill 



incapacity in various ways. Fertile workers seem to appear 

 more quickly and in greater abundance in colonies of 

 Cyprian and Syrian boes, after they become hopelessly 

 queenless, than in Italian colonies. 



The maxillee and labium of the worker-bee are much 

 elongated (Fig. 35), The maxillae (Fig. 35, A^ mx, mx) 

 are deeply grooved, and are hinged to the head by strong 

 chitinous rods (Fig. 35, A. c, c, Si, Si), to which are 

 attached the muscles which move these parts. The gutter- 

 like extremities (Fig. 35, A, /, /) are stiffened with chitine, 



Fig. 36. 



Tongue bent under Head. 



Tongue extended Jor 

 sucking; 



*n Maxillae, 

 •^ Li?ula. 

 * fn Sub-mentnm. 



a Duct from upper head 

 and thoracic g^lands. 



X Retractor muscles, the 

 opening at upper base of 

 tonprue between paraglossa. 

 All from Wolff. 



Base of Lahiuut. 



and, when approximated, form a tube which is continued 

 by a membrane to the mouth-opening of the pharynx, just 

 between the bases of the jaws. This tube forms the larg- 

 est channel through which nectar passes to the pharynx. 

 The labium varies in length from .23 to .27 of an mch in 

 diameter. By the sub-mentum (Fig. 35, A, o) and two 

 chitinous rods (Fig. 35, A, b, b), it is hinged to the max- 

 illa3. The base or mentum is chitinous beneath and mem- 



