Eratigena agrestis
(Hobo Spider)

Taxonomic Hierarchy

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Class: Arachnida
  • Order: Araneae
  • Suborder: Araneomorphae
  • Family: Agelenidae
  • Genus: Eratigena
  • Species: Eratigena agrestis

Common Name (AASMore information icon)

Hobo Spider

Other Common Names

Aggressive House Spider (inaccurate, but occasionally still used)

Author

Charles Athanase Walckenaer, 1802

Pronunciation

air-uh-TIH-jen-uh ah-GREZ-tiss

Identification Traits

Disclaimer: The following table provides a quick overview of the spider's basic attributes. The physical traits are greatly generalized in order to aid in the identification and sorting of spider species using our search feature. This information is not exhaustive, and keep in mind that traits such as color, markings, and overall size and shape can vary widely within a species due to variables such as the spider's age, gender, diet, hydration level, climate, and habitat. Though experienced arachnologists and hobbyists can often classify spiders rather accurately based on their unique markings and general appearance, it's important to know that scientifically accurate spider identification relies on detailed taxonomic keys and microscopic examinations of a spider's reproductive organs.

Female iconFemale Male iconMale
Body size More information icon 10mm - 15mm 7mm - 10mm
Eye count 8
Primary Colors
Identifying Traits Fuzzy or hairy appearance, Unique pattern, Chevron pattern, Visible spines on legs, Legs solid color
Web style Funnel web


Additional Remarks

  • Currently no solid scientific evidence suggesting that the venom of this species is of medical significance in humans.
  • Knowledge of the hobo spider’s bite and venom has evolved over the years with more recent research being published. It has officially been removed from the CDC’s list of “dangerously venomous spiders,” even!
  • The nickname “aggressive house spider” sometimes comes from peoples’ mistaken translation of the name agrestis. Also, the spider’s movements, or at least the purposes for them, are often misunderstood by people unfamiliar with spiders.
  • Similar looking species in North America include Tegenaria domestica and Eratigena atrica. These are often mistaken for one another, but are actually quite different when seen by an experienced eye.
  • Sternum has a solid, pale stripe down the center with dusky sides, as opposed to Tegenaria domestica and Eratigena atrica, which have pairs of spots on the sternum instead.
  • Palps of the males are significantly larger (wider) than those of Tegenaria domestica and Eratigena atricaIn images, this can often help with separating them.
  • Found around and outside of man-made structures; not typically living indoors. Specimens found indoors have probably inadvertently wandered in from outside, especially adult males during mating season.

Featured Pictures

Picture of Eratigena agrestis (Hobo Spider) - Male - Dorsal Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Female - Dorsal Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Female - Dorsal Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Male,Female - Dorsal Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Egg Sacs Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Female - Eyes Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Egg Sacs Enlarge picture icon
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Picture of Eratigena agrestis (Hobo Spider) - Female - Egg Sacs,Lateral Enlarge picture icon
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