![]() It is common for people to use home remedies and never see a physician unless severe conditions develop. Rarely is the culprit caught in the act, captured, and/or properly identified. Only a few dozen bites are attributed to this spider for several reasons. A low blood platelet count (<150,000) may occur at about 36 hours which recovers in about 7-10 days. The headache may be accompanied by nausea, weakness, joint pain, fatigue, and vision impairment, symptoms commonly associated with migraine headaches. The most common symptom is a severe headache, sometimes within 30 minutes but usually within 10 hours, which does not respond to aspirin and may last for 2-7 days. It may take several months to heal and often leaves a permanent scar. The fully developed lesion may be up to 1/2-1" (12-25+ mm) or more in diameter. Tissues beneath the scab may die and slough away severe bites may require surgery to close. The cratered ulcer crusts over to form a scab. About 24 hours later the blister usually breaks, and the wound oozes serum. Within 3 minutes or less, a small, insensitive, hard area appears which is surrounded by an expanding reddened area of 2-6" (51-153 mm) in diameter. The initial bite produces a very slight prickling sensation. The bite of these spiders typically produces a necrotic lesion similar to that caused by brown recluse spiders, Loxosceles spp. However, some females may live 3 or more years. Females lay eggs in sacs until cold prohibits activity and usually die from late autumn to early spring. Mating occurs, and most males die before October. Males mature the second summer from June through September, and females mature from late June to September. They spend the second winter as immatures. They molt a second time about one week after emergence and continue moiling monthly for about 12-15 molts. In the spring, spiderlings molt once within the sac before emerging as 2nd instars in early June. In mid- September to October, the female spins a hemispherical silken egg sac into which she deposits her eggs. Agelenidae) with carapace (cephalothorax dorsum) yellowish to dark brown with 2 dark longitudinal stripes, abdomen yellowish gray to dark brown and patterned, and legs banded/ringed/annulated. ![]() domestics has banded/ringed/annulated legs. Domestic (Tegenaria domestics) and giant (Teganaria gigantea) house spiders with posterior line of 4 eyes curved rearward and sternum with lateral dark stripes containing 3 pairs of light circular marks each in addition T.Abdomen with longer posterior spinnerets extending beyond abdomen, visible from above. Cephalothorax, abdomen, and legs with plumose (featherlike) hairslsetae. With 8 eyes in 2 transverse lineslrows, front row slightly curved forward and rear row almost straight. Color variable with carapace (cephalothorax dorsum) light to medium brown, with dark stripe to either side of lighter midline stripe, dark stripe with lateral extensions in posterior half abdomen with interrupted light midline stripe with about 5 light colored triangular shaped loops on each side bordered by a dark background but usually 1st I or 2 and last 2 or 3 loops incomplete, last 2 or 3 loops chevron-shaped (stripes meeting at angle medially "army sergeant stripes") with enlarged ends, white on darker dorsal coloration gradually changes to dark blotches on a lighter background on sides and venter sternum (venter central area between coxae) with light midline stripe and usually solid dark lateral stripe on each side legs solid light brown, no bands. RECOGNITIONĪdult female body length about 7/16-5/8" (1 1-1 6 mm) including oblong abdomen, male body length about 5/16-7/16" (8-1 1 mm) total size including legs about 1-1 314" (40-50 mm) in diameter. The hobo spider appears to be rapidly expanding its range, displacing many native spiders as it spreads. This species was introduced from Europe and first found in Seattle in the 1930's, and is currently common in the Pacific Northwest (Idaho, Montana, Oregon, Utah, Washington) and British Columbia. Their webs are a nuisance but their bite is of medical importance to both humans and pets because it may result in a slow-healing lesion. The common name comes from this spider's method of very rapidly expanding its distribution by hitching rides with humans along major highways in the Pacific Northwest it was formerly known as the aggressive house spider. ![]() The Hobo Spider Common Name: Hobo Spiders Scientific Name: Tegenaria Agrestis (Walckenaer) Class/Order/Family: Arachnida/Araneae/Therididae Metamorphosis: Simple INTRODUCTION ![]()
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