Labeling a range of bars in barplot?

On Tue, 2005-12-13 at 10:53 +0000, Dan Bolser wrote: 

Hi, I am plotting a distribution of (ordered) values as a barplot. I 
would like to label groups of bars together to highlight aspects of the 
distribution. The label for the group should be the range of values in 
those bars. 

As this is hard to describe, here is an example;