  We investigate the discontinuity of codings for the Julia set of a quadratic
map. To each parameter ray, we associate a natural coding for Julia sets on the
ray. Given a hyperbolic component $H$ of the Mandelbrot set, we consider the
codings along the two parameter rays landing on the root point of $H$. Our main
result describes the discontinuity of these two codings in terms of the
kneading sequences of the hyperbolic components which are conspicuous to $H$.
This result can be interpreted as a solution to the degenerated case of Lipa's
conjecture on the monodromy problem of the horseshoe locus for the complex
H\'enon family.
