476 EXTERNAL ANATOMY OF INSECTS. 
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 mazille 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 overhangs 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- 
tennge 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 antennee, 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 
the genera Copris, Onitis, or Ateuchus, and you will see 
the nose marked out in the centre of the anterior part of 
