What are these

[deemann1]

One of my nucs looked a bit weak today they dwindled alot over winter, what are these egg things in pic
https://ibb.co/9nVQrXK
https://ibb.co/RhSVtLr

 

[masterBK]

Pupae of a fly but wouldn't know which one unless I could actually see the adult fly. I have seen small black coloured flies on moist floor debris in the past.