Although sometimes thought to be insects, spiders are arachnids. There are somewhere in the area of 3,000 species of spiders in the United States. The spiders of most interest in the Midwest include common house spider as well as the brown recluse spiders and black widow spiders. Brown recluse spiders measure ¼ an inch and are tan to dark brown with a fiddle shaped marking on the top of its cephalothorax. They have 6 eyes in three groups of two. They are usually found around rocks, in tool or utility boxes, in woodpiles and many other places outside. They may also be found inside as well. Black widow spiders (females) measure ½ an inch and are black with a reddish hourglass shape on the abdomen. However, color and marking are not always a reliable means of identification. Identification is best left to a professional. Call us at Redline Pest Control to identify and control your problem. A visit to the emergency room is recommended if bitten by either one of these.