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Entomology (Study of Bugs)/What is this albino cockroach looking animal

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Question
Pale cockroach 1
Pale cockroach 1  

Pale cockroach 2
Pale cockroach 2  
I live in Lexington, SC. Near Columbia, SC.
This critter (see photos) just appeared on my chair.
It was fleet of foot.
On its first flush, it swam, rather deftly.
I've never seen anything like it. Am I likely to see it again?

Answer
Hi, Janey:

Thank you for including the images with your question.

The insect is a longhorned beetle known as the "Ivory-marked Beetle," Eburia quadrigeminata . Here's more about it:

http://bugguide.net/node/view/2873

This is a harmless insect and I'm sorry you simply didn't release it back outdoors.  They are sometimes attracted to lights at night, and that is probably how it came to be inside your home.

They can also emerge from furniture, baseboards, and other milled lumber, years or even decades after construction or acquisition.  As a larva, the beetle tunnels in dead wood.  They do NOT re-infest objects they emerge from.

Hope this puts your mind at ease.

Sincerely,

Eric

Entomology (Study of Bugs)

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Eric R. Eaton

Expertise

I answer insect and spider identification questions ONLY. Attach images if possible. No "what bit me?", "what do I feed this bug in captivity?", or science fair project questions please. NO TECHNICAL QUESTIONS ABOUT INSECT PHYSIOLOGY.

Experience

Principal author, Kaufman Field Guide to Insects of North America. Professional entomologist employed previously at University of Massachusetts, Chase Studio, Inc., and Cincinnati Zoo; contract work for West Virginia Department of Natural Resources, Smithsonian Institution, and Portland (Oregon) State University.

Publications
Author, Kaufman Field Guide to Insects of North America, Missouri Conservationist magazine, Ranger Rick, Birds & Blooms, Timeline (journal of the Ohio Historical Society). I have contributed to several books as well.

Education/Credentials
Oregon State University, undergraduate major in entomology, did not receive degree.

Awards and Honors
One of the top 50 experts in all categories for AllExperts.com, 2009.

Past/Present Clients
Principal author of the Kaufman Field Guide to Insects of North America, Smithsonian Institution (contract), Cincinnati Zoo (employer), Portland State University (contract), Chase Studio, Inc (employer), Arkansas Museum of Discovery (guest speaker). Currently seeking speaking engagements, leadership roles at nature festivals, workshops, and ecotours.

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