Entomology (Study of Bugs)/Mystery Insect!


Beetle on Plant
Beetle on Plant  

Beetle on Ground
Beetle on Ground  
Hello, my name is Jonathan and I recently discovered this insect crawling around the desert, and eating Lupine plants. I live in Lake Havasu City, Arizona. I was curious to know what this creature is and i would appreciate any help you could give me.

Dear Jonathan - This is Cysteodemus armatus, a blister beetle (Coleoptera: Meloidae) known as a desert spider beetle; see http://tinyurl.com/cuffrrp for an image. Unlike some other species of blister beetles, ones like these do not appear to be pests. BTW, the yellow form that you found appears to be less common than the white variety of this species - nice find!
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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