Currently viewing the category: "Ground Spiders and Ant Mimics"
What's That Bug? does not endorse extermination

Subject: Pretty spider
Location: Stillwater OK
July 22, 2017 6:07 am
Found this spider in my dining room this morning. I’ve never seen one like this before.
Signature: Angela

Ant Mimic Ground Sac Spider

Dear Angela,
This is one of the Ant Mimic Ground Sac Spiders in the family Corinnidae, and we are confident we have identified is as a species with no common name,
Castianeira amoena, thanks to images on BugGuide.  According to SpiderBytes:  “Some Castianeira species are thought to mimic velvet ants (Mutillidae), rather than ants. Mutillids are not actually ants but wasps, and the females are wingless and brightly coloured, with extremely painful stings. In this case, harmless Castianeira spiders might benefit by looking like the much more dangerous velvet ants, and thus be avoided by predators (this is called Batesian mimicry).”

What's That Bug? does not endorse extermination

Subject: Castianeira crocata?
Location: Southwest Missouri
May 18, 2017 12:27 pm
Is this a Castianeira crocata? I’ve never seen this one before. Just found it in my basement.
Signature: TK

Ground Spider

Dear TK,
You are correct.  This is a Ground Spider,
Castianeira crocata, and BugGuide does not list a common name.  According to SpiderzRule, a close relative in the same genus, Castianeira descripta, is commonly called a Red Spotted Ant Mimic Spider.  This is not considered a dangerous species to humans.

What's That Bug? does not endorse extermination

Subject: love bug
Location: Kelowna, British Columbia, Canada
May 18, 2016 11:44 am
Hello 😀
This punk jumped on my face in the night, a couple weeks back.. I tried to catch him, but he escaped.
Today however, I caught him going about his business speedily, high up on the wall.
Having a hard time identifying this lovely specimen… Please help.
Much love to all the insect lovers ♡
Signature: Tina Marie

Ground Spider

Ground Spider

Subject: sneaky punks
Location: Keliwna, British Columbia, Canada
May 21, 2016 4:50 pm
Hello Bugman.. I sent a similar identification request just the other day. Same spider type, different specimen.. This one being larger and more photogenic. Excited for an ID on these guys. Love your website!!!
Signature: Tina Marie

Ground Spider

Ground Spider

Dear Tina Marie,
We went back through our unanswered mail to locate your original submission.  We believe both of your spiders are the same species of Ground Spider in the family Gnaphosidae, and that species is
Sergiolus montanus based on this BugGuide image.  According to BugGuide:  “There appears to be quite a bit of variation in the abdominal patterning of this species. A microscopic exam of the spider’s genitalia is typically necessary for accurate identification.”

Ground Spider

Ground Spider

What's That Bug? does not endorse extermination

Subject: Strange looking spider named clint eastwood?
Location: New Jersey, USA
March 20, 2016 12:09 pm
What is this thing?
Signature: F

Ground Spider

Ground Spider

Dear F.,
This is a harmless Ground Spider,
Sergiolus capulatus.

What's That Bug? does not endorse extermination

Subject: Spider
Location: St louis Missuri
March 9, 2016 11:06 pm
What type of spider is this ?
Is it poisinus?
Signature: Spider man

Parson Spider

Parson Spider

Dear Spider man,
This distinctive spider is a Parson Spider in the genus 
Herpyllus, probably Herpyllus ecclesiasticus.  Like most spiders, it has venom, and like most spiders, it is not considered dangerous to humans.  It is unlikely that it will bite a person, and if a bite does occur, there will likely be nothing more than local irritation.

What's That Bug? does not endorse extermination

Subject: other mystery insects that are bugging me (no pun intened)
Location: All in the letter
October 5, 2015 4:11 pm
Hello again, this is Cicada lover. I am wondering if you could identify these other insects and arachnids I have failed to ID. Number one is a spider I found which appears to have a red Christmas tree with a star on top. (I could be wrong) but I didn’t think this was a black widow because their legs are longer, and I have found no black widow spiders with a “star” on top of the red blotching. The spider was found in Waterset (a neighborhood in Apollo Beach FL). The next bug is a caterpillar which was found in a nature preserve called Circle B Bar Reserve in Fl. Picture number 3 is of a…… is of a thing that’s like a beetle with no hard exoskeleton. it was also found in Circle B Bar Reserve.
P.S., Thank you for ID-ing that Cuckoo wasp!
Also, the quality is not that great because I had to crop the photos in order for me to send this.
Signature: Cicada lover

Ground Spider

Ground Spider

Dear Cicada Lover,
We are more than happy to continue to identify your mystery insects, however, please confine your submissions to a single species unless there is a very good reason to include different families or classes of creatures in the same inquiry.  We try to keep our archives correctly classified and it is very confusing and additional work to split one submission into multiple postings.  Your spider is a Ground Spider in the family Corinnidae, most likely
Castianeira crocata, and it has no common name.  Its markings are quite distinctive and this image posted to BugGuide matches nicely.  If you resubmit your other images each on its own form, we will attempt additional identifications.

What's That Bug? does not endorse extermination