  We mimic the Wolfenstein scheme of quark flavor mixing to describe neutrino
oscillations in the standard model. We identify the parameter $\lambda$ with
the experimentally measured value of the mixing element responsible for
atmospheric neutrino oscillations. The matrix elements responsible for solar
neutrino oscillations and the Chooz angle are taken to be proportional to
$\lambda^2$ and $\lambda^3$, respectively. Using present world average data on
neutrinos, we derive bounds on the other parameters $A$, $\rho$, and $\eta$, of
the new scheme.
