Entomology (Study of Bugs)/Mystery Bug


So I went to clean out our pools filter today and found a large bug of some sort that must've fallen in the pool. I would love to find out what in the world this thing is!

Dear Megan - First off, please let me apologize for the delay in responding to your question; I was away from home from Thursday through yesterday evening, and forgot to put myself on 'Vacation' status. That aside. what you have here is a long-horned woood-boring beetle (Coleoptera: Cerambycidae) in the subfamily Prioninae. The larvae of many of these beetles usually tunnel in roots of trees, but this one (Orthosoma brunneum) appears to favor above-ground parts - see http://tinyurl.com/kbm3n7z for images and more information.

Hope this helps,

Entomology (Study of Bugs)

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Ed Saugstad


Will accept most questions in general entomology, including those related to medical entomology, taxonomy, ecology, arthropod surveillance, and pest management. If you are requesting a 'mystery bug' identification, PLEASE either attach an image to your question, or post an image on a web page (such as Flickr) so that I can look at it, as verbal descriptions frequently are insufficient for a definitive identification.


21 years in the U.S. Army as a medical entomologist; duties varied from surveillance of pest populations (including mosquitoes, cockroaches, ticks, and stored products pests) to conducting research on mosquito-virus ecological relationships and mosquito faunal studies. Ten years as a civilian analyst for the Department of Defense, primarily on distribution of vector-borne diseases worldwide. Limited experience on surveillance of agricultural insects in North Dakota and Indiana.

Entomological Society of America, West Virginia Entomological Society, Society for Vector Ecology, National Speleological Society, West Virginia Association for Cave Studies.

American Journal of Public Health, Contributions of the American Entomological Institute, Japanese Journal of Sanitary Zoology, Journal of Economic Entomology, Mosquito News, and Mosquito Systematics.

B.S. in entomology from North Dakota State University in 1963, M.S. in entomology from Purdue University in 1967.

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