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Entomology (Study of Bugs)/red spiders inside the house

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Question
I have seen many of the same type of red spider (usually dead because I am not a "friendly to insects hostess) and regularly spray around the house. SO I find these red spiders, body about 1/4 to 3/8 inch long. legs and body red. really haven't picked them up to look closely.
Someone said and colored spiders are poison so it really freaked me out.
I have about a zillion little red spider mites on the rocks around the house outside - are these bigger spiders the grown up version of the little mini spiders? Thank you for any help.

Answer
Linda:

Without seeing at least an image of the spider in question, I can't really help you.  I will say that the only spider that comes to mind that might fit your description is this one:

http://www.spiders.us/guide/species/dysdera-crocata/

They are not harmful but admittedly they do look menacing.

Eric

Entomology (Study of Bugs)

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Eric R. Eaton

Expertise

I answer insect and spider identification questions ONLY. Attach images if possible. No "what bit me?", "what do I feed this bug in captivity?", or science fair project questions please. NO TECHNICAL QUESTIONS ABOUT INSECT PHYSIOLOGY.

Experience

Principal author, Kaufman Field Guide to Insects of North America. Professional entomologist employed previously at University of Massachusetts, Chase Studio, Inc., and Cincinnati Zoo; contract work for West Virginia Department of Natural Resources, Smithsonian Institution, and Portland (Oregon) State University.

Publications
Author, Kaufman Field Guide to Insects of North America, Missouri Conservationist magazine, Ranger Rick, Birds & Blooms, Timeline (journal of the Ohio Historical Society). I have contributed to several books as well.

Education/Credentials
Oregon State University, undergraduate major in entomology, did not receive degree.

Awards and Honors
One of the top 50 experts in all categories for AllExperts.com, 2009.

Past/Present Clients
Principal author of the Kaufman Field Guide to Insects of North America, Smithsonian Institution (contract), Cincinnati Zoo (employer), Portland State University (contract), Chase Studio, Inc (employer), Arkansas Museum of Discovery (guest speaker). Currently seeking speaking engagements, leadership roles at nature festivals, workshops, and ecotours.

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