Entomology (Study of Bugs)/Bug identification


5mm black bugs
5mm black bugs  

Black bugs
Black bugs  
I found these very tiny 5mm black bugs on my tile floor in my living room in Scottsdale AZ. Some were walking around, others were dead. I found at least 3 dozen. I thought they were all dead but as soon as I swept them up some started scurrying away. I've included a few photos. Hope it helps to identify these pests.

Dear Eileen - Unfortunately, I cannot see enough detail in your images to make a definitive identification. The only beetles resembling these that I would be concerned about would be black carpet beetles; see http://tinyurl.com/lnn67cw for an image and http://tinyurl.com/pvgfq3 for a fact sheet that includes control recommendations. If your beetles do not seem a match for those, I suggest that you take some of them to your local office of the University of Arizona's Cooperative Extension Service (see http://tinyurl.com/pjw9nvj for contact information) for assistance in identification and any necessary control recommendations.
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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