Entomology (Study of Bugs)/mystery bug


mystery bug
mystery bug  
Thank you in advance for your help. I live in Detroit, MI. I saw this bug crawling on my wall, its small, skinny and moves pretty quick. it was greyish black with 8 legs and two long antennae on the front and what seems to be three in the back (shaped like a T) very weird.  It sort of reminds me of a hybrid of a roach and a centipede. i saw it today 11/16/13 at around 5pm. Thanks again for your help! :-) ive attached a pic

Hi, Alena:

Thank you for including the great image!

This is a "Four-lined Silverfish," a fairly common, primitive insect that is rarely a pest:


On rare occasions, silverfish are problematic in libraries because of their fondness for starchy materials, such as the glue used in bookbinding.  Otherwise, they are of little consequence.

Thanks again for sharing your find!


Entomology (Study of Bugs)

All Answers

Answers by Expert:

Ask Experts


Eric R. Eaton


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.


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.

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.

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.

©2017 About.com. All rights reserved.