INSECTS : STINGS AND OVIPOSITOKS. 153 



where thin ; but in the thickened parts, as the main 

 teeth, the transverse ridges, and the back, it is a clear 

 amber-yellow ; the strengthening back-piece deepening 

 to a rich translucent brown. 



There is, however, in this species of mine a second 

 set of implements of which the French naturalist, ob- 



OTJXER SAW OF SA"wrLT. 



a. A portion more enlarged. 



servant as he was, takes not the slightest notice ; and 

 his English commentator appears to have as little sus- 

 pected its presence. This pair of saws that we have 

 been looking at is but the sheath of a still finer pair of 

 lancets or saws, which you may see here. These are 

 much slenderer than the former, and are peculiar in 

 their construction. Their extreme tip only bears saw- 

 teeth, and these are directed backwards, but one side 

 of the entire length presents a succession of cutting 

 edges, as if a number of short pieces of knife-blades had 

 been cemented on a rod, in such a manner as that the 

 cutting edges should be directed backwards, and over- 

 lap each other. The other lateral surface is plain, and 

 both are convex in their general aspect. The appear- 

 ance of these implements is very beautiful ; for the 

 7* 



