This sounds like what my bees look like when I accidently get MO on them.
They end up getting kicked out of the hive, dead or alive.
 
 
>      quite different, in that it was very very dark (mine are quite
light),
>      and looked like its fur had been rubbed off (ie it may not have
>      started out dark). Also, its wings were like two little bits of
string
>      and, I beleive, were being chewed during the wrestling match by the
>      other bee. It didn't look as if the bees were trying to sting each
>      other during the bout.
>
>      Afterwards, the dark bee then just crawled around on the ground, but
>      did not seem interested in trying to fly.