162 



EVENINGS AT THE MICKOSCOPE. 



having its front edge hollowed out "witli two deep 

 notches, the central jjiece between them itself notched 

 at its tip. Immediatelj above this notched central 

 tooth (I speak of the relative position of the parts, sup- 

 posing the insect to be crawling on the ground, without 

 reference to the wav in which we turn it about on the 

 microscope), and united wdth it, there is a sort of solid 

 square pedestal, on which stand a pair of jointed or- 

 gans, and between them an oblong horny plate rounded 



MOTTTn OF BEETLE. 



{Seen from beneath.') 

 a, upper Up ; 6, mandibles; c, maxilla' ; rf, maxillary palpi ; «, tongue; /labial 



palpi ; g, chin. 



at the tip, where it bears two bristles. Tliis latter is the 

 tongue ; while the jointed organs on each side are 

 called feclers,^^«i'^j>i / though this is a begging of the 

 question, f jr we do not really know the function of 

 these organs. The chin, the tongue {Itgiild), and these 

 palpi, constitute together the under lip. 



