Ivory Marked Beetle

can you identify the beetle in attached photo
I found two of these beetles on the farm where I live in eastern Iowa. Its body is about an inch long and its antenna are slightly longer. The body is tan with white (maybe light tan) spots as illustrated. The farm has a windbreak with white pines, spruce, mulberry, silver leaf maple, hackberry, and red oak. Also blackberries and raspberries.
Eugene Clark

Hi Eugene,
This is an Ivory Marked Beetle, Eburia quadrigeminata and the larvae bore in the wood of many hardwood trees including ash and hickory. Adults sometimes emerge years after milling. Adults are attracted to rotting fruit.

Correction: (10/13/2005) Saperda cretata or Eburia quadrigeminata ??
Dear Bugman, I have spent several hours cruising your website and find it all very fascinating ! I did find one misidentification, or perhaps I am wrong. Attached is a photo of a Cerambycid beetle that is common here in Georgia (I am an avid collector of beetles). I have come to know this beetle as being the “Ivory Marked Beetle” or Eburia quadrigeminata. I have seen this beetle posted twice on this website and it was identified as the Spotted Apple Borer (Saperda cretata). You say these beetles are active during the day. I know from my experience that they are found at night actively crawling on sick/dying hardwood trees. I have never seen nor collected one during the day. Is it S. cretata or is it E. quadrigeminata ???

Thanks George. One of our reliable sources steered us awry on this one. The correction is much appreciated.

6 thoughts on “Ivory Marked Beetle”

  1. I just had one of these nasty looking bugs on my umbrella outside – ewwwwww and it is 2:49 pm so yep they are out during the day…..

    • The Ivory Marked Beetle is a native species, and to the best of our knowledge, they do not pose a threat in the decimation of ash trees. The Emerald Ash Borer is a documented threat, as it is not native and does not have natural enemies in North America. Read about the Emerald Ash Borer on Emerald Ash Borer Info.

  2. One just found me as I was washing dishes at 2 30 pm here in Huntsville, Al. Downright scared the bejesus out of me. I described it as literally having Rams horns, nice to know they arent carnivorous. Thanks.

  3. I just found one of these critters on the floor in my upstairs hallway. Creeped me out. I took a picture and tossed it outside. I live in southern Michigan. Are these bugs bad?


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