What's That Bug? does not endorse extermination

ant like bug with balck and yellow stripes.
August 27, 2009
Ive been living imy my house for over 12 years, and my father recently found these bugs crawling all over the branches he had cut off the tree a few weeks back, that were not there when he cut them off. He has NEVER seen a bug like it.
It looks like a big ant with black and yellow stripes going down its back. I got a close of picture of two, that look like they are mating.
buggedeyed
Lancaster, CA

Mating Red Headed Ash Borers

Mating Red Headed Ash Borers

Dear buggedeyed,
These are mating Red Headed Ash Borers, Neoclytus acuminatus.  The mating pair was probably attracted to the smell of the freshly cut wood.  The larvae bore in ash trees, and according to BugGuide:  “Larvae feed on the sapwood of ash and other hardwoods, and even occasionally on vines and shrubs. Larvae are commonly found feeding in downed timber with the bark left on.”

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What's That Bug? does not endorse extermination

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