I shouldn't read my own postings, as I can always think of revisions when I
do, but this one cries out for it. I wrote:

"In a way, hybridization may be *more* likely in cases in which species
scarcely overlap. An individual of species A at the edge of its range may
be unable to find a mate, while there may be many available unmated
individuals of species B in the same area. This may account for the
majority of wild hybrids."

For a somewhat clearer explanation: If either species A or species B is at
the edge of its range, it is less likely to find a mate, but when *both*
are at the edge of their range, the probability of *two* willing partners
in miscegenation should be greatly increased.

Dennis Paulson phone: (206) 756-3798
Slater Museum of Natural History fax: (206) 756-3352
University of Puget Sound e-mail: dpaulson at ups.edu
Tacoma, WA 98416