Identifying Spiders is difficult to do without knowing more than just the spider's color.. Body type, the presence or absence of hair, and where the spider is found can all help to make a positive identification. A spider with a black body and brown legs is likely to be a common house spider, which is not dangerous.
There are many different species of spiders around the world, and simply naming an individual's colouring is not enough to go on. You would also need to name the country you saw it in along with its habitat (ie; forest, field etc.) - and even then, it might be impossible to say exactly what it was without an accurate picture.
Incidentally, a spider's lower body is called the abdomen - the part you refer to as its butt is the spinnerets, which it uses to produce silk for webs.
It is probably a house spider if it has light tan marks on it's back
it could be a brown widow or a black and white jumping spider
a Halloween spider
Mexican blondie perhaps.
its either a Huntsman or a Wood spider
Bloosem Tree no its britney!
Your mom.
Don't mind if I do. (Yum.)
Cat faced spider
I believe it is a type of jeweled spider.
# i don,t know i just fond a red spider with a black butt and black tips on feet and black fangs let me know if you find out
The male green jumping spider has a dark red head and a bright green body. The scientific name for this spider is Mopsus Mormon.
6,000 on its butt.
It is almost impossible to tell for certain what kind of spider a given specimen is simply by its appearance. In this case, you can rule out many species of spiders, but additional information such as size and web type would be key in its identification.
a spottious (spot-ti-us) spider,they are very rare in America but are most known for in England, only in the warm part of England because spottious spiders like warm climates better than colder climates
Maybe an Earwig...
I think its a white tail :D