Battus philenor question

[nottke]

In a previous item Pierre Plauzoles wrote;
>Equally strange is the fact that Aristolochia elegans is toxic to many
>areas' B >philenor larvae.  I have, however, heard that some do OK on it.
>Whether the
>latter is true or not, I don't know.

If indeed, A elegans is toxic to B philenor in some locales, is it the
larvae that are occasionally tolerant of always toxic A elegans, or is it
that all larvae are intolerant, but that the toxicity of A elegans varies
with locale?

Jim Nottke
Pfafftown, NC 27040
nottke at ols.net