Entomology (Study of Bugs)/bug in dorm


My roommate and I have a roommate that has a habit of not cleaning the things he uses and his food going bad. One night we noticed that the cup that he used to rinse had this bug on it. Besides being grossed out, we could not figure out what the insect was. If you can help us that will be great, Thank you.

Dear Logan - What you have here is a western conifer seed bug,  Leptoglossus occidentalis (Hemiptera/Heteroptera: Coreidae), a very common nuisance pest. Originally native to western North America, hence its common name. However, it recently has expanded its range eastward across the continent, and now occurs in Europe as well. Although these bugs often come indoors in search of shelter, they do no harm there beyond simply having an unpleasant odor of crushed or disturbed. See http://tinyurl.com/yf4dj7t for additional 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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