Chip asked me to post this response...
The pupa appears to be a variant of the orange/pink/off white monarch pupae we had years ago. This mutation is recessive - as in albinism. The adults are normal in pigmentation and viable. They mate readily and produce normal numbers of offspring. The mutation evidently modified the color of the hemolymph and tissues beneath the pupal cuticle
We would really like to get this mutation back into culture. Unusual phenotypes such as this one are great for student projects and this one promises to help us understand the basis for the coloration of the normal pupa.
See the "Orange Monarch Pupae" article on pp 50-51 of the 1999 Monarch Watch Season Summary, available for download at http://www.monarchwatch.org/read/seasum.htm
Also see our "Wanted: Orange Monarch Pupae
" article from the July 2006 Email Update.photo by Jim Lovett