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Yellow sac spider

Cheiracanthium sp.

Description:

A tan spider with very long forelegs. From the tip of a leg to the end of its abdomen, it was almost 1 inch long. The tips of the legs are black and the same applies to the chelicerae. Its bite is venomous and purportedly "medically significant".

Habitat:

Spotted indoors.

Notes:

The last photo was taken with flash to show the shiny/smooth aspect of the sternum, which is a shade darker than the rest of its body. This is either C. inclusum (native) or C. mildei (introduced).

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9 Comments

Hema
Hema 7 years ago

I suspect that I have been bitten by one of this. A few years ago,on the abdomen. No signs of the bite at all .

mauna Kunzah
mauna Kunzah 7 years ago

Jemma, that's the same way I catch any arthropods in my house. If I see more I'll release them outside. I've seen at least five today alone, and the one in this spotting made a silken sac on the ceiling.

I think Bug Eric's site pretty much confirms my suspicion that this is a Cheiracanthium sp. Tomorrow, I'll zoom in on my photo to differentiate between C. inclusum and C. mildei. Thanks for all of your help!

Hema
Hema 7 years ago

Mauna,why don't you leave this as an unknown spotting till we do more research.

Hema
Hema 7 years ago

Mauna,first you should wait for somebody to confirm. So far i have seen two in my home. I lifted them in a bottle and released them outside.I have not seen any since.What I usually do is ,give the bed sheet a real shake when I make the bed,once in the nite and once in the morning. including the blankets. Scan the surroundings and you should be fine.These are not like bed bugs which take over or those nuisance mosquitoes or flies or even ants.

mauna Kunzah
mauna Kunzah 7 years ago

By the way, I thought "yellow sac spider" was the name only given to C. inclusum (the most worrisome species in N. Am.). A species-level ID would be lovely.

mauna Kunzah
mauna Kunzah 7 years ago

Oh God! I'm kind of nervous now (I have some family with health conditions). I let this spider hang out in my house last month since I didn't know! Thank you so much, Jemma. Time to check the house.

Hema
Hema 7 years ago

Yes indeed it is . I found one in it's sac in the bathroom.
http://www.projectnoah.org/spottings/229...

mauna Kunzah
mauna Kunzah 7 years ago

I'd like someone to confirm whether this is a yellow sac spider. I'm very concerned, because the bite is venomous and I've seen a lot of these around lately.

mauna Kunzah
Spotted by
mauna Kunzah

New York, USA

Spotted on May 5, 2013
Submitted on May 24, 2013

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Cheiracanthium sp Northern yellow sac spider Yellow Sac Spider Spider

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Reference

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