Grass Spiders

Pronunciation

How to pronounce Agelenopsis: //ˌæɡɪlɪˈnɒpsɪs//

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Summary

Agelenopsis, or grass spiders, are a genus of funnel weavers known for their distinctive sheet webs with funnel-like retreats. They are characterized by their rapid movement and lack of sticky webbing, which they compensate for with speed. The genus contains 14 species found in North America, easily recognized by their eye arrangement and web structure.

Physical Characteristics

Typically small to medium-sized brown spiders with longitudinal striping on their bodies, two prominent hind spinnerets, and a distinctive arrangement of eight eyes in three rows (two, four, and two). They also have somewhat indistinct bands on their legs and two dark bands running down either side of the cephalothorax.

Identification Tips

Agelenopsis can be identified by their funnel-shaped webs, rapid movement, and distinctive eye arrangement. The spinnerets are visible without needing to flip the spider over, which aids in identification. Males wander in search of mates and females remain mostly stationary in their webs, making the male's wandering a key aspect in their identification.

Habitat

Common in open areas, gardens, and woodlands, often found in low-hanging shrubs and grass. They may build webs near light sources to attract insects.

Distribution

Primarily found throughout the United States and Canada, with some species present as introduced in Europe and Central Asia.

Diet

Primarily insects, captured via their funnel webs.

Life Cycle

Agelenopsis funnel-web spiders typically live for one year, dying often after the first frost. Males die shortly after mating, whereas females may die while guarding their egg sacs.

Reproduction

Females wait for wandering males to find them. After mating, females lay a disc-shaped egg sac, often camouflaging it with debris before dying.

Health Concerns

Agelenopsis spiders are generally docile and non-aggressive. They will flee rather than bite, only doing so if threatened without an escape route.

Collecting Methods

• Hand collecting
• Suction samplers

Preservation Methods

• Ethanol preservation
• Drying and pinning

Similar Taxa

• Agelena

Misconceptions

Despite their appearance, Agelenopsis spiders are harmless to humans and do not pose any venomous threats unless provoked.

Tags

• spiders
• arachnids
• Agelenopsis
• grass spiders