  We study two identical FitzHugh-Nagumo oscillators which are coupled with one
or two different time delays. If only a single delay coupling is used, the
length of the delay determines whether the synchronization manifold is
transversally stable or unstable, exhibiting mixed mode or chaotic oscillations
in which the small amplitude oscillations are always in-phase but the large
amplitude oscillations are in-phase or out-of-phase respectively. For two
delays we find an intricate dynamics which comprises an irregular alteration of
small amplitude oscillations, in-phase and out-of-phase large amplitude
oscillations, also called events. This transient chaotic dynamics is sandwiched
between a bubbling transition and a blowout bifurcation.
