ZOOLOGY. 191 



strong in the different kinds, in some, approaching to horn. 

 Besides, the preceding Insects possess some parts which are 

 peculiar to themselves, and are not found to belong to any 

 other description of Animals ; as the Aniennce or Horns, 

 which are situated on the fore part of their heads, and offer 

 a principal distinguishing character, they are jointed and 

 moveable in every part, in wh'ch particular they differ from 

 the horns of other animals ; that they are organs of sense, 

 is apparent, from their perpetually moving them fo- ward ; 

 yet the hard coat with which they are invested, and their ex- 

 treme shortness ia some genera, v ^uld induce an idea that 

 they are not the perceptive org^^.is of touch or feeling ; the 

 generally received opinion is, that they pre the instruments 

 or organs of hearing, but this is not satisfactorily explained ; 

 they differ greatly in form, in the different tribes, from which 

 circumstance they offer convenient characters, on which to 

 found the respective genera. The Palpi or Feelers, are 

 another peculiarity attached to Insects ; they are mostly in 

 pairs, in some kinds four, and in others six : they are short, 

 jointed, and moveable, but destitute of the coating or crust 

 observable on the Antennae ; they are situated on each side 

 the Mouth. 



The Mouth Is situated at the fore-part of the head, inclin- 

 ing downwards, in some kinds it is placed quite under the 

 breast, as in the genus Curculio : it varies greatly in form ; in 

 some of the Beetle tribe, the inner edges are furnished with 

 strongly notched or serrated jaws, having the appearance of 

 teeth, which is also the case with some of the Locusts, and 

 other genera; some tribes possess two, and others four jaws; 

 in a few kindsj the mouth is drawn out to a rigid point: in many 



