EXTERNAL ANATOMY OF INSECTS. 477 



brate animals should bear the same name. And any per- 

 son who had never examined an insect before, if asked 

 to point out the nose of the animal, would immediately 

 cast his eye upon this part : so that one of the principal 

 uses of imposing names upon parts — that they might be 

 more readily known — would be attained. If it is object- 

 ed, that calling a part a nose that has not the sense of 

 smell, supposing it to be so, might lead to mistakes — I 

 would answer, that this objection is not regarded as va- 

 lid in other cases : for instance, the maxilla are not ge- 

 nerally used as jaws, and yet no one objects to the term ; 

 because, from their situation, they evidently have an ana- 

 logy to the organs whose name they bear. But enough 

 on this subject — we will now consider the part itself. 



To enable you to distinguish the nose of insects when 

 it is not separated from the rest of the face by an impressed 

 line, you must observe that it is the terminal middle part 

 that sometimes ovei'hangs the upper-lip, and at others 

 is nearly in the same line with it; that on each side of it 

 are the cheeks, which run from the anterior half of the 

 eyes to the base of the mandibles. Just below the an- 

 tennae is sometimes another part distinct from the nose, 

 which I shall soon have to mention ; so that the nose 

 must not be regarded as reaching always nearly to the 

 base or insertion of the antennae, since it sometimes oc- 

 cupies only half the space between them and the upper- 

 lip, which space is marked out by an impressed line. 

 But you will not always be left at such uncertainty when 

 you want to ascertain the limits of the nose ; for it is in 

 many cases a distinct piece, separated by an elevated or 

 impressed line from the rest of the face. This separa- 

 tion is either partial or universal. Take any species of 



