Subject: Borer, hickory?
Location: Nashville, Tn
June 29, 2014 9:26 am
These bright yellow bugs are unlike any I have seen. They have a lot more yellow, and the pattern is different than all the other pics on your site. Can you identify this for me? They are all over a Hackberry tree. I did not see any Hackberry borers on your site. Is there such a thing?
Signature: Tanya

Six Banded Longhorn Beetles

Six Banded Longhorn Beetles

Dear Tanya,
Your images are very blurry, and though the details are absent, it is possible to make out the bold markings and bright colors on these Six Banded Longhorn Beetles,
Dryobius sexnotatus, which appear to be mating.  According to BugGuide:  “Primary host: sugar maple (Acer saccharum) (4) (larvae bore in living and dead trees); also basswood, beech, linden and rarely elm (1) Can maintain itself on other hosts for a short period, but survival seems to depend on the availability of large, very old (overmature) sugar maple trees (Perry et al. 1974).”  BugGuide also notes:  “Uncommon/rare (3)(4); widely scattered, populations are sparse (1); listed as rare and threatened on several state websites.  Dury (1902) noted that D. sexnotatus was once abundant but was even then becoming rare.  Perry et al. (1974) noted a sharp decline in the collection since 1942.”

Awesome! Thank you very much for getting back with me! Are they still rare? They were mating quite aggressively a few weeks ago .. lol.
I also inquired about a spined micrathena spider, also a blurry pic. I have attached a better one. Quite beautiful color!

To the best of our knowledge, the Six Banded Longhorn Beetle is still rare.  We did see the Micrathena image, and we did not post it because of the poor quality of the image.  The significance of the Six Banded Longhorn Beetle sighting prompted us to post despite the poor image quality.  We like to choose high quality images for posting whenever possible unless there is some other significant reason, like a great letter, that will encourage our staff to post blurrier images.

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Location: Nashville, Tennessee

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