28 



HUMBLE BEE — WASP. 



Kraepelin has described at the end of the proboscis 

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

 certain peculiar 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. 



ffou- 



Fig. 28. — SectiiJii tlirough a ta?te- 

 cup (after Will). SK, Support- 

 ing cone; N, nerve; SZ, sense- 

 cell. 



Fig. 27.— Under side of left maxilla of 

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

 Shm, protecting hairs; Tb, tactile hairs ; 

 Mt, base of maxillary palpus. 



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

 a wasp {Vespa vulgaris), aftev Will, magnified 55 times. 

 Gm are the taste-eups ; Shm, the protecting hairs ; 

 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. 



