>Michael, obviously this particular hive is a lost cause
No, a frame of brood will probably set things right if it's a failing queen. A frame every week for three weeks always seems to work for laying workers.
> but do you feel it's late in the season for re-queening in general? Even starting from scratch with a four-day-old larvae, there would be brood by mid-August with all of September and part of October left, and New England usually has a pretty good flow from asters and golden rod.
>I'm curious because I just did a walk-away split this morning and I hope I didn't doom them.
If you get a dearth be sure to feed them. If not, then let them build up on nectar. They will probably do fine.