28 



HUMBLE BEE — WASP. 



Kraepelin has described at the end of the proboscis 

 in the humble bee (Bombns), besides the hairs of touch, 

 certain pecuL'ar club-shaped hairs, which he believed 

 were perforated at the end, and which he considered to 

 be taste-hairs; and Haller has ascribed the same 

 function to some very similar hairs which he found on 

 the under lip of the Hydrachna. 



Fig. 28. — Section throiigli a taste- 

 cup (after Will). SK, Support- 

 ing cone ; N, nerve ; SZ, sense- 

 cell. 



FiK. 27.— Under side of left maxilla of 

 Vespa (after Will). Gm, Taste-cups ; 

 Shm, protecting hairs; 76, tactile hairs; 

 Mt, base of maxillary palpus. 



Fig. 27 represents the under side of the left maxilla of 

 a wasp ( VesjM vulgaris), after Will, magnified 55 times. 

 Gm are the taste-cups ; Shm, the protecting Lairs ; 

 Tb, the tactile hairs. 



Fig. 28 represents a section through one of the taste- 

 cups. Sic is the taste-cone contained in the cup ; it is 

 perforated and continuous at the base with a nerve-fibre. 



