this is a common fishing spider... common to all of north America although not venomous they will bite if it feels threatened.
If you look on the back it mite have a small violin mark where the eyes are. If it does, the its a brown recluse spider do not touch!
A common brown house spider.
i think it would b a tarantula
A black spider that has a red stripe on the back is possibly a red spotted ant mimic spider. They walk on six legs instead of eight and can be found in Arizona.
your mummy spider
that is wierd
A black widow spider is black with a red mark on it's abdomen; this might or might not be what you meant. The black widow sometimes has a red mark on her back, as well. The red backed spider of Australia, a relative of the black widow, has an orange red mark on the back.
This is the Herpyllus Ecclesiasticus, more commonly known as the Parsons spider. This spider gets its name because the white stripe on the abdomen resembles an 18th Century parson's cravat.
a spider known as a cross spider usaually found in the uk
A garden spider, if it looks like this: http://i.pbase.com/v3/48/95248/1/48116303.GardenSpider5.jpg. Apparently a Argiope aurantia. We have them all over the place here and I've never heard of them being dangerous.
They have a silver back.
a red back looks almost the same. But doesnt have an hourglass shape. It has a red stripe on top of its abdomen.
The tan and black spider with horns on its back is the Arrow-shaped Micrathena. These spiders spin their webs in spirals and hang in the center of the web, often mistaken for a piece of wood or leaf.
The Red-back spider (Latrodectus hasselti) is commonly found in Australia. They are a small black venomous spider with long thin legs, and the females have a red stripe on their globular abdomen.