  We derive an exact expression for the two-point correlation function for
quantum star graphs in the limit as the number of bonds tends to infinity. This
turns out to be identical to the corresponding result for certain Seba
billiards in the semiclassical limit. Reasons for this are discussed. The
formula we derive is also shown to be equivalent to a series expansion for the
form factor - the Fourier transform of the two-point correlation function -
previously calculated using periodic orbit theory.
