Currently viewing the category: "Sac Spiders"
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Black Footed Spider

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Spider
Location: SE lower Michigan
December 27, 2010 2:20 pm
Can you help me identify this spider? We have spotted them a few in our home.
Signature: H. Smith

Black Footed Spider

Dear H. Smith,
Your spider is a Black Footed Spider or Yellow Sac Spider, Cheiracanthium mildei, a species that was introduced from Europe.  It was once believed to be a species whose bite could cause necropsy around the bite, but that speculation is no longer believed.  The revision can be read about on the American Journal of Tropical Medicine and Hygiene website.

Thank you so much for taking a look at it.
We really do appreciate this awesome service to those of us out here that have no clue as to how to identify these things.

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What's That Bug? does not endorse extermination

Ant Mimic Spider

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Orange Tiger Striped Spider
June 23, 2010
This was the coolest looking spider I could hardly see. He was barely 1/4 of an inch long, and looked as though he was ready to pounce upon me. I looked at him, He looked back, so I got my camera, and found him once again on my porch.
He rared his abdomen up at an angle, then he started “twirling” it around right before he jumped.. He could jump about 8 inches in one leap, and was very very fast when he ran. I did not notice his tiger stripes until I looked at the photographs. I tried to get a nice macro shot, but he just didn’t want to wait till I adjusted my shutter speed…
Each time I would go in for a shot, he would wiggle his butt, then jump off to the left or right. He tried to go under an object, I carefully moves it off from him, and so the showdown began.
Date of the picture is 6/23/10
Rick Nelson (SCWIDVICIOUS)
Lexington, NC

Antmimic Spider

Hi Rick,
Using BugGuide, we quickly identified your spider as Castianeira amoena, a species in the family Corinnidae, commonly called Antmimic Spiders or Ground Sac Spiders.

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What's That Bug? does not endorse extermination

Yellow Sac Spider

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What kind of spider is this?
December 17, 2009
I keep finding these little spiders in my house, specifically in my bathroom. They seem to like to be on the ceiling above the shower and I always freak out when I see one while I’m in there because I don’t know what kind of spider it is and whether or not they are of any danger to me. They are usually about the size of a nickel and very pale in color. Can you tell me what kind of spider this is and a little bit about it please?
Jessica
Providence RI

Yellow Sac Spider

Yellow Sac Spider

Dear Jessica,
This species that has been introduced from the Mediterranean, Cheiracanthium mildei, is known by several common names, including Yellow Sac Spider, Black Footed Spider, and Cream House Spider.  The spider will bite, most often when it is trapped in clothing.  It was once believed that the bite of the Yellow Sac Spider was associated with blisters and lesions, but this has not proven to be the case, and the species should be removed from the medical concern list according to BugGuide.  You may read more on the ASTMH website of the American Journal of Tropical Medicine and Hygiene.

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What's That Bug? does not endorse extermination