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Hobo Spider

Kingdom: Animalia 
Phylum: Arthropoda 
class: Arachnida 
Order: Araneae 
Family: Agelenidae 
Genus: Tegenaria 
Species: T. agrestis 

Hobo spiders, T. agrestis, were almost definitely introduced to North America in  or around the early 1930's, more than likely by commercial vessels traveling over  from Europe.  It is said that the bite of this spider directly resembles that of  a brown recluse and is many times mistaken.  The bite has been known to cause  necrosis, or tissue death.
Hobo Spider's bite is generally not fatal to healthy humans.  The larger of the spider, the female, can reach lengths of up to .6 of an inch.  The male only a length of up to .43 of an inch.  Although the Hobo spider is very  dangerous a little common sense will go a long way in preventing a bite. 

Hobo spiders have made their presence in many parts of Pacific Northwest America.  Contact in Europe is uncommon, although without competitors the hobo  spider has adapted to urban areas around the United States. 
The color of the hobo spider is brown and rustic.  They have a herringbone pattern on top of their abdomen, and smooth solid colored legs.  
The  web can be either a curved or flat sheet of silk curved and slanting down to a  tube shape where the spider rests.  They are a difficult spider to identify due to  many look-a-likes. 
FYI cool website (

The bite of the Hobo spider is sometimes up to 50% dry or no poison is  injected.  There are a few things to look for if you do happen to get injected  with the spiders poison (tegenarism).  The bite of the spider is painless at  first. 
Blisters form soon afterwards and generally burst, causing necrosis.  Lesions are formed and can take sometimes up to three years to heal depending  on the location of the bite.  Other common symptoms include headaches that can 
last up to a week, diarrhea, nausea, and weakness.  Death is a rare occurrence  but not unreal with the spider.
Although its nickname happens to be "aggressive  house spider" the Hobo spider is not aggressive and only bites for defense.  Most  bites come after the spider has been squished or disturbed.  Male Hobo Spiders are short-lived but pose more of a threat.  They are more venomous than  the females and are active mid-summer to fall. 

Simple common sense will further your chances of getting a bite from the Hobo Spider, much less any spider.  Simply wear protective clothing while working  around spider dwelling areas, i.e. wood sheds under rvs and cars that have been  sitting for a significant amount of time.  Shaking clothes out before entering your home and simply keeping your bed linens and comforters off the ground and  away from walls.  Sealing off cracks and holes in your house and foundation will  take you a long way in the prevention of any spiders. 

Once a clean up around the yard and home has been done a perimeter spray can be  used to control the spiders further.  Tempo WP , Demon insecticides or Demand CS can be sprayed around  windows, doors, wood piles, etc.  to help control an infestation.  The Hobo and other spiders can be found in dark moist areas, woodpiles, crawl spaces, and around the  perimeter of the home.  These are the areas to be cleaned up and treated.

Our thanks to Christina Helmig for research and writing which made this information page possible!

Bites and Stings    Pest Management    Animals and Pests    Spiders    Hobo Spider