Currently viewing the category: "Ground Beetles"

Subject: Unknown stag beetle?
Location: Raleigh, NC
August 6, 2017 5:51 pm
I found these beetles mating when I was going out for a walk. The blueish lining on the edge of the beetle and the pinchers were very interesting. I’ve searched online for this type of beetle but I found nothing. Please help me identify this beetle.
Signature: Seiya Furukawa

Mating Warrior Beetles

Dear Seiya,
Despite the large mandibles, these are not Stag Beetles.  They are Ground Beetles in the genus
Pasimachus which Arthur V. Evans refers to as Warrior Beetles in his book Beetles of Eastern North America.  A similar looking individual is pictured on Ohio Birds and Biodiversity, and it is called a Blue Margined Ground Beetle, Pasimachus depressus.  This image from BugGuide is not too different from your image.  BugGuide does not provide a common name, but does provide this description:  “Large, black, elytra and pronotum often bordered with blue/violet. Elytra of male shiny, of female dull, neither have striations or punctures. Base of pronotum (next to abdomen margined). Hind tarsus long and slender.”

Subject: Green and blue bug
Location: MInnesota
June 9, 2017 7:23 pm
I see this bug right in my yard. It is amazing but what is it?
Signature: BettyLou

Six Spotted Tiger Beetle

Dear BettyLou,
This is a harmless, beneficial, predatory Tiger Beetle, most likely an unspotted Six Spotted Tiger Beetle,
Cicindela sexguttata, which is pictured on BugGuide. where you will find this comment:  “C. sexguttata generally become less spotted as one goes west, so many individuals in Iowa are likely spotless.”

Subject: Beetle
Location: Broken Arrow, OK
June 17, 2017 7:26 am
A neighbor of mine posted something about this bug. None of us knows what it is and I was wondering if you knew? I tried to google it but no luck….
Signature: Penny Roberts

Virginia Metallic Tiger Beetle

Dear Penny,
We began our research on identifying this Tiger Beetle with a web search that led us to the Beetles in the Bush site, where there are images of the Florida Metallic Tiger Beetle posted, and they look so similar to the individual in your images, that we suspected they might be in the same genus, so we searched the genus 
Tetracha on BugGuide which led us to the Virginia Metallic Tiger Beetle, Tetracha virginica, which is featured in some nice BugGuide images.  According to BugGuide:  “Crepuscular or nocturnal. Hides during day under stones, rocks, etc., especially near water. Attracted to lights at night” and it is described as “Tiger beetle shape. Glossy green body and elytra, distinctive compared to Cicindela species. Legs are a contrasting tan. Elytra lack maculations. Compared to other members of this genus, no light crescent-shaped markings at apex (tip) of elytra. Note also large size–largest North American member of this genus.”  Tiger Beetles are fierce hunters that pose no threat to humans, and for that reason, we are tagging this entry as Unnecessary Carnage.  We hope you inform your neighbor that these beautiful beetles, much prized by collectors for their gorgeous metallic colors, are beneficial in the hope that future encounters to not end with a death.  As an aside, though named the Virginia Metallic Tiger Beetle, this species is actually reported as far west as Texas and Oklahoma based on BugGuide data.   

Virginia Metallic Tiger Beetle

Subject: Bug found in London, on, canada
Location: London, ontario, canada
June 3, 2017 9:33 am
Hi, I found this bug crawling across my basement floor yesterday. We live just outside of london, ontario, Canada. Its springtime and it has been hot recently. This bug is close to an inch in length I would say.
Signature: Curtis

Big Headed Ground Beetle

Dear Curtis,
We are pretty certain this is a Big Headed Ground Beetle,
Scarites subterraneus, but if we are wrong, it is a relative in the same genus.  You can verify our identification by comparing your image to images posted to BugGuide.  Ground Beetles are beneficial predators that pose no threat to humans.  We are post-dating your submission to go live to our site later in the month when our editorial staff is away from the office on holiday.

Subject: Flying Green Devil
Location: Northern Kentucky
May 17, 2017 12:44 pm
I have several of these around my office in Hebron, KY, which is just a few miles away from the Cincinnati Airport. They’re kind of like June Bugs, but I don’t think they are. Would you please let me know what these are? Thank you!
Signature: – Andy

Six Spotted Tiger Beetle

Dear Andy,
Though your image is quite blurry, it definitely depicts a gorgeous, beneficial, predatory Six Spotted Tiger Beetle.

Subject: Violet ground beetle?
Location: Lower Laurentians, Quebec
May 4, 2017 5:58 am
is this a violet ground beetle? I found lots of them on my garden now the snow has cleared here in Quebec, Canada and I read that they eat slugs so I’m very excited. However I just wanted to check it is not some other type of beetle which is going to eat my plants?
Many thanks,
Signature: Anne

European Ground Beetle

Dear Anne,
We are curious where you discovered that this beetle is called a Violet Ground Beetle because that is not a common name used on BugGuide where we believe we have correctly identified this as a European Ground Beetle,
Carabus nemoralis, and according to BugGuide its range is:  “n. US & Canada, absent from Great Plains (BG data)  native to Europe, adventive in NA (in the east: NF-MN-ne.VA; in the west: BC-CA to AB-UT; isolated in the Saskatoon area, SK).”  According to Encyclopedia of Life:  “This species, in the subgenus Archicarabus, is a European introduction. Black or dark piceous, upper surface more or less cupreous or greenish bronze, sides of prothorax, and often elytra, usually violaceous. Elytron with three rows of foveae and on each interval with suggestion of five ridges, so irregular and confluent as to give a scaly appearance. Length 21 to 26 mm.”  According to Ground Beetles of Ireland:  “A very eurytopic species, clearly favoured by human activities and widespread in gardens, parks, pastureland and woods in lowland areas.”  According to  “Adults spend the day under loose bark or among deep plant litter, emerging at night to forage over a wide area, usually on grass or among litter but they also ascend mossy tree trunks. Prey includes slugs and snails, woodlice, millipedes and centipedes. Adults are active from early spring, breed in the summer, and persist into the autumn. ”  We are still curious where you found the common name Violet Ground Beetle because we have not found it used in relation to this species.

Thanks so much – the violet ground beetle is just my ignorance looking at pictures on the web and thinking I saw something that was the same. Thanks for your expert guidance. Brilliant service. I hope to use you again.
Many thanks,