Hello,
This is likely C. mutabilis
They were collected near Santa Clarita as grubs by a fellow hobbyist.
Of a group of ~30, I was only successful in obtaining four pupae (dang learning curve).
The pupae have been under supervision in order to document their progress, however, I was advice not to disturb them often so as to avoid even more fatalities.
The pupae measure in the range of 20-25mm in length from head to abdomen, and are very close to eclosion.

They look like jewels that stick through the dirt.
You can clearly see the claws fully formed inside, and the fact that the pupal skin is already wrinkled tell me that they are within days of eclosing.
Let's hope to see them soon.
OM
This is likely C. mutabilis
They were collected near Santa Clarita as grubs by a fellow hobbyist.
Of a group of ~30, I was only successful in obtaining four pupae (dang learning curve).
The pupae have been under supervision in order to document their progress, however, I was advice not to disturb them often so as to avoid even more fatalities.
The pupae measure in the range of 20-25mm in length from head to abdomen, and are very close to eclosion.
They look like jewels that stick through the dirt.
You can clearly see the claws fully formed inside, and the fact that the pupal skin is already wrinkled tell me that they are within days of eclosing.
Let's hope to see them soon.
OM