168 EVENINGS AT THE MICROSCOPE 



with fine hairs. Some deny it to be tubular, and maintain 

 that it is solid; but certainly it appears to me to have a 

 distinct cavity throughout, with thickish walls. 



_ Under a high power the structure of the investing hairs 

 is very interesting; for they are seen to be flat filaments of 

 the yellow chitine, very much dilated at their bases, and 



JAWS OP BEE 



set side by side in regular whorls, the bottom edges of 

 which form the rings of which ,the tongue is composed. 

 The tip is probably a sensitive organ of taste, for it termi- 

 nates in a minute globose pulpy body, whose surface is 

 beset with tiny curved points. Thus I have pointed out 

 to you all the parts which enter into the mouth of the 



