A brown spider that has a white diamond on its back is known as a Parson spider. This spider does have a mildly venomous bite.
The spider that is black with a white crescent on its back is the Brown House Spider. This spider is often confused with the red-back spider.
The worst kind.
a tarantula!
Spider is light brown with gold or yellow diamond back
Have seen a very small spider with 4 white dots and 1 red dot. Not a red back. Ta ~Snaff
Araneus diadematus(AKA cross spider) is the only spider i can think of that i know of that is brown/black and has a cross on its back. Here are some photos. http://www.nicksspiders.com/nicksspiders/araneusdiadematus.htm
The answer is a brown camel spider.
The brown recluse spider is the kind of spider that has a brown oval mark on its back. This spider's bite is extremely deadly to animals and humans.
Is it a white orb? In that case it would be an egg sack. If it is actually a white spot it cold be a wolf spider. I am sure another user could provide a more detailed answer but I have seen wolf spiders with white spots.
yes it was crawling up my bedroom curtain
An Arrowhead spider is brown with a green back. This spider is also known as a Triangle Orb Weaver. This spider is not venomous.
your mummy spider