  This is an updated version of ANT-0253.
  Let F be a number field with absolute Galois group G. We associate, to each
continuous, solvable C-representation of G of GO(4)-type, an automorphic form P
of GL(4)/F with the same L-function. As a consequence we exhibit an infinite
class of primitive, 16-dimensional representations for which the Artin
conjecture holds.
