Calling all arachnologists --?

I'll probably post this in lawn and garden, too. It's not a very technical question. I just need help identifying something.



My Mother-In-Law's house has been plagued by large spiders for the last three years. They look similar to an average, brown house spider, but they're usually around the size of a silver dollar.



They don't build nests. They like to hide underneath made bed sheets, in piles of clothes or in other crevices. They can jump up to three feet, and they're very aggressive.



They're brown, with yellow stripes running down their backs, and visible fangs. How can these things be driven out? Would they likely be breeding in an outdoor shed or a woodpile? We've only ever seen them inside, and never around the areas just mentioned.

Calling all arachnologists --?
Well Im trting to piece together the description. It is most likely not a true jumping spider (Saliticdae) becasue the largest specimen in the world is only about the size of a quarter.

The colors are very general, there are many types of spider with that brown/yellow coloration, however most of them are web builders, like orb weavers.

A large spider with the ability to jump and is agressive, I can only think of one thing........A nursery web spider.

These spiders belong to the family Pisauridae, many of them are commonly found around water, but they will venture near and often into homes. They are very fast terrestrial hunting spiders that can jump and fit the descrption. They are not dangerous to people, but can give a nasty bite.

Here are some images of my first guess:



http://bugguide.net/node/view/32859

http://bugguide.net/node/view/32860



Another guess if I could make another would be one of the huntsman or giant crab spiders, once again a large terrestrial hunter with a powerful bite and lightening speed.

http://bugguide.net/node/view/66101



Many types of wolf spiders can also be found in houses, they dont really jump as much as the other two, but can if need be, here is a picture of what a general wolf spider looks like.

http://bugguide.net/node/view/8696



Oh and the fangs that you are seeing may actually just be the pedipalps of the males. They are large boxing-glove appendages on the anterior end, they sometimes look like fangs, but they are actually used to transfer sperm during copulation.



Anyways i hope that helps, It difficult to I.D spiders without a picture, but piecing together all the clues makes it easier
Reply:Maybe Brown Recluse spiders, although these spiders are very dangerous and aggressive, be careful, but try looking those up.
Reply:Fascinating!



TFTP
Reply:Sounds like a wolf spider to me.



Thing is spiders are preditors. If ther ewere no bug in your house for them to eat they would leave. A really, really thorugh house cleaning to destroy all bug homes, some bug killer in hidden spots and I bet you get rid of them.
Reply:It sound like a common jumping spider. What area of the globe she resides in would be needed to accurately determine the exact species.



The large amount of them is not surprising if her house proves to be a suitable enviornment. An egg sack can produce over 500 baby spiders.



The best route to rid yourselves of them is make the environment unsuitable for them, you can pest tent the home.



A sidenote these creatures aren't being aggressive towards you there natural instinct is to jump in order to flee, attack prey and defend territory.