I found a nest built of dry mud stuck to the outside of my brick house. Inside I found a fat white worm?

Question

and a bunch of little green worms. Do you have any idea what they are? Are they termites?

Answer 1

Not termites, termites don't have any worm-like
stage in their life cycle, the juveniles are white and
soft, but they have well-developed legs and move
around actively.

What you have is undoubtedly some kind of wasp
that builds a mud nest, fills it with paralyzed insect
larvae as food for its young, lays an egg in the
cell and seals it up. The white worm is the wasp
larva and the green worms are its food supply. It
is not a mud dauber wasp, as they stock their
cells with paralyzed spiders, not insect larvae.

Answer 2

Termites make dirt tunnels that would reach all of the way to the ground. A type of wasp called a mud dauber will build a tunnel nest to lay its eggs in. Besides mud dauber larvae, there will be paralyzed bugs in it (food).

***edit****
[Mud Dauber nests]

Mud daubers are often seen at the edge of mud puddles collecting mud to construct their tublar nests. Organpipe mud dauber nests are partitioned off with mud and each cell is provisioned with several paralyzed spiders and implanted with an egg. After eggs hatch, larvae feed on captured spiders with larvae maturing in about three weeks. Larvae spin a cocoon and overwinter. Males may guard the nest while the female forages. Mud cells may be constructed in deserted nests of the black and yellow mud dauber.

Female black and yellow mud daubers paralyze spiders, pack them into the cell with their head until full, lay one egg and seal the cell. Larvae are pale yellowish about 3/4 inch long when fully grown. Pupation occurs within a cocoon inside the cell. There are two broods with hibernation in the cocoon. Female blue mud daubers take over a mud nest, open a cell by moistening the clay with water and emptying it of spiders and the other wasp egg. They then deposit their own paralyzed spiders, lay their own egg and seal over the cell. Hosts are mostly black widow spiders.

..................................................................
[Termite tunnels]

Subterranean termites go from their nest underground, travel through their mud tunnels up into your house to eat up it’s wood members and then they take this delicious food back to their nest to share with the other members of the family. The termite workers that do all of the damage to your home are blind and all they do is eat 24 hours a day!

If we knew where the nest was, our job would be so much easier. The nest could be 30ft or so under ground and maybe 100ft or so away from your house - Who knows for sure?

Answer 3

This sounds like a wasp species that builds a nest of mud to protect its eggs/larvae, paralysing its prey item and sealing it into the nest as food for the growing larvae. The prey will be the worm that seems paralyzed.
Cheers.

Answer 4

I'm not sure. It sounds like the fat white worm is the queen and the other ones are workers.

Answer 5

They sound like Mud Dauber wasps.

Answer 6

this sounds like some species of mud dauber wasp. They form these tiny mud chambers to raise their offspring.

Answer 7

Wasps.

Answer 8

The missing link between a lump of clay and the K.K.K.!

Answer 9

Maybe