I found a good description of what happens in the brood cell here: http://www.ars.usda.gov/Research/docs.ht…44&page=14

There are good pictures of different stages in the development of the bee and of mite reproduction.

There I also find the answer to my question and it’s yes. There are more remains of the bee development than just one piece of whitish/yellowish.

The first remain is from the larva when it becomes a pupa and the second is from the pupa when it becomes a fully grown bee.

Why this is important is because I have to take in consideration the age of the pupa/bee when I remove it. Do I find “extra” remains even if the pupa has not changed into a fully grown bee (but not hatched), the extra is varroa feces and there is a mite even if I don’t see it. That can happen when the mite doesn’t have progeny. i then don’t have to find the mite to know there is one.

Varroa feces, larval and pupal skins
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