Unlike many other similar-looking spiders, hobo spiders do not have dark bands (e.g., multiple arm bands) on their legs. This is especially important for things that you stick your hands and feet into like: roller skates, baseball gloves, gardening gloves, boots, and rain gear. Vetter R.S. Facts on File: NY, 191p. It is important to remember that spiders seen in Utah are not bound by the territorial lines decided on by humans, therefore their distribution is subject to change. The key word is "confirmed" bite. This area includes the states of Washington, Oregon, Idaho, and Utah. We feel that it is likely that there are Hobos in Northern California. The most frequently encountered group is the funnel-web spiders, which includes the hobo spider. The hobo spider runs at an average speed of about 0.45 meters (17 inches) per second, with a maximum speed of about 1.1 meters (40 inches) per second. If you live in or around Utah, there are four potentially dangerous varieties of spiders that may be living in and around your home. If you cannot identify the spider… The venom of the black widow is 15 times as toxic as the venom of the prairie rattlesnake. 1987. Closely related species such as the domestic house spider and the giant house spider will only have one prong. Tegenaria agrestis are known as hobo spiders and aggressive house spiders.Because of its common features and color, they can easily be confused with other spiders.. Sticky traps should be folded and placed firmly against the baseboards where children and pets cannot access them. Hobo spider control is difficult because of their adaptable nature. According to ​​First Aid Expert Rod Brouhard, "Most brown recluse bites heal just fine without any medical intervention or first aid. Jones D. 1983. If you cannot identify the spider, no problem. The Hobo Spider is one of the most dangerous spiders found in Utah. Biology and Medical Importance of the Aggressive House Spider, Tegenaria agrestis, in the Pacific Northwest (Arachinida: Araneae: Agelenidae). Hobo Spiders. If the door sweeps aren't in tact and the entry ways sealed, you will still have an occasional hobo entering the home. Immature spiders and males may be lighter or duller and may lack the red marking. Categories Small Life Tags focus stack, focus stacking, hobo spider, insect, macro, small life, spider, Tegenaria agrestis. Hobo spiders are fairly common in Utah. Both spiders can cause necrosis, or dying flesh, in the area of the bite. Rainer Altenkamp, Berlin / Wikimedia Commons / CC BY-SA 3.0, DesertTrip / Wikimedia Commons / CC BY-SA 4.0, Blend Images - ERproductions Ltd / Getty Images. Of those samples, 1,211 have been funnel web spiders (Agelenidae), and 639 have been hobos! Unfortunately, there is no conclusive evidence to suggest that either side is correct without a doubt; however, you will notice that the "evidence for" is highly circumstantial, while "evidence against" is scientific. Case studies of non-verified hobo bite victims linked to the development of necrotic lesions in the PNW (Akre and Myhre 1991). A related species, the desert recluse, can be found in the southwest United States, including the extreme southwest corner of Utah. Like the hobo spider, the desert recluse and other recluse spider species are frequently blamed for necrotic lesions and skin infections that actually have other causes. When you pick up wood, wear gloves. In Utah, hobos are frequently found indoors from August through October. Most bites heal just fine without any medical intervention or first aid. The retromargin is the one that would have been closest to the mouth when the chelicerae were still attached to the spider. During "hobo season" consider placing one or two traps in every room, and on either side of the bed against the baseboards to increase trapping/control. It … If you have a lesion on your body and you see a small brown spider in your home a few days later, hobo or not, you cannot blame that spider. These fine, almost clear hairs have a feather-like appearance. Many bites have occurred when people put on clothes that had been lying around and unknowingly pressed the spider against their skin. The desert recluse and other recluse spiders are difficult for non-experts to identify. insect bites (flea, mite, biting fly, etc. Toxicon, 21:337-339. For those who treat spider or suspected spider bites (letter). and Roe A. Clean up clutter. It is important to remember that spiders seen in Utah are not bound by the territorial lines decided on by humans, therefore their distribution is subject to change. I have observed hobo spiders running right up the concrete steps into my home on many occasions. Spiders, webs, and egg sacs can also be sucked up (hobo egg sacs are found outside). In Europe, hobos do not typically live in domestic dwellings and therefore do not come into contact with people (Jones 1983; Roberts 1985). Tape up the edges of cardboard boxes. Within a day or so, blisters may develop at the site of the bite and eventually rupture. Last accessed August 19, 2011. The Hobo Spider is one of a small number of spiders in North America whose bites are generally considered to be medically significant. and Gertsch W.J. Hobo Spider . In August through October, there is usually an influx of hobos and other spiders entering the home as the mating season picks up. First Aid expert, Rod Brouhard, offers this information about treating spider bites: Anaphylaxis is always the biggest concern with any type of bug bite. Hobo Spider Characteristics The female Hobo Spider reaches sizes of 11 – […] By 1968, the spider could be found in other areas of Washington and in parts of Oregon and Idaho. Two apparently isolated populations of hobo spiders are reliably associated with single homes in each of Golden and Boulder, … Spiders found in Utah include 22 unique species from confirmed sightings by contributing members of Spider ID. In the US, hobos frequently come indoors where people are, and could potentially bite (Akre and Catts 1990). Based on the rarity of brown spiders, the hobo spider is probably responsible for most of the necrotic spider bites in Utah, with the possible exception of cases in extreme southern Utah. The bite can result in redness in the area for up to 12 hours. One case study of a women developing a nodule with pustules, inflammation, and 2 areas of ecchymosis after feeling a "bite" in bed. Severe brown recluse spider bites can also cause some symptoms over the entire body (systemic reaction). Seal all foundation cracks and crevices leading into the home with silicon caulking or sealant. Vetter R.S., Roe A.H., Bennett R.G., et al. Varying in size but never more than two inches long, they have a brown cephalothorax (the body part above the abdomen that the legs are connected to) with darker brown markings. 2006. Mated females start laying eggs in mid-September, with one to four egg sacs produced over a period of four weeks. This will help keep wandering hobos out of your bed and minimize the chance of rolling over on one during the night. The hobo spider, Eratigena agrestis, is native to Europe and was introduced into the Pacific Northwest in the 1930's.

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