  Extensive photometric multisite campaigns of the Delta Scuti variable FG Vir
are presented. For the years 2003 and 2004, 926 hours of photometry at the
millimag precision level were obtained. The combinations with earlier campaigns
lead to excellent frequency resolution and high signal/noise. A multifrequency
analysis yields 79 frequencies. This represents a new record for this type of
star. The modes discovered earlier were confirmed. Pulsation occurs over a wide
frequency band from 5.7 to 44.3 c/d with amplitudes of 0.2 mmag or larger.
Within this wide band the frequencies are not distributed at random, but tend
to cluster in groups. A similar feature is seen in the power spectrum of the
residuals after 79 frequencies are prewhitened. This indicates that many
additional modes are excited. The interpretation is supported by a histogram of
the photometric amplitudes, which shows an increase of modes with small
amplitudes. The old question of the 'missing modes' may be answered now: the
large number of detected frequencies as well as the large number of additional
frequencies suggested by the power spectrum of the residuals con rms the
theoretical prediction of a large number of excited modes. FG Vir shows a
number of frequency combinations of the dominant mode at 12.7162 c/d (m = 0)
with other modes of relatively high photometric amplitudes. The amplitudes of
the frequency sums are higher than those of the differences. A second mode
(20.2878 c/d) also shows combinations. This mode of azimuthal order m = -1 is
coupled with two other modes of m = +1.
