What's That Bug? does not endorse extermination

should i be worried
a friend of mine told me to send you this picture of a spider i saw running across my living room. i have seen a few of them lately, should i be alarmed or are they a harmless spider helping control other pests in my house.
thanks
Thomas

Hi Thomas,
Your spider sure looks like a Carolina Wolf Spider, Lycosa carolinensis, the largest North American Wolf Spider. Females are about twice the size of males, reaching almost 1 1/2 inches. Like your specimen, sometimes this spider has a darker stripe along the midline of the abdomen. This spider is usually found in open fields on the ground and hunts mainly at night. It ranges throughout the United States and Southern Canada. It is harmless, but a good hunter that will help keep your home free of pests.

What's That Bug? does not endorse extermination

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