Adding per-panel text to panel strips in lattice xyplot

I would like to add auxiliary information to the bottom of two strips on 
each panel that comes from a table look-up using the values of two 
variables that define the panel.  For example I might panel on sex and 
race, showing 3 randomly chosen time series in each panel and want to 
add (n=100) in the bottom strip to indicate the 3 curves were sampled 
from 100.  Is there a not-too-hard way to do that?

I would like to do this both with and without groups= and superposition, 
but especially with.

Thanks
Frank

Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University