Entomology (Study of Bugs)/mystery bug

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Hi. I'm from San Francisco, California.  I was wondering if you know what kind of bug this is? It's a skinny black fly with clear and black/dark brown spots on the wings.it's about a centimeter long and has 2 very very small antennas. I've attached two images of the bug: a top view of the bug and a bottom view of the bug. please let me know and if you have any details about this bug. Here's a link to a side image of the bug in case it helps: http://img.photobucket.com/albums/v476/mew6871/IMG_34051_zpsf0fd3083.jpg

Thanks,
CL

Answer
Dear CJ - This is a female March fly (Diptera: Bibionidae); possibly Bibio albipennis - see http://tinyurl.com/kz6k8wk for images of both sexes. They usually are not considered pests (unless they become nuisances when occurring in large numbers); see http://tinyurl.com/kszf9bn for more information.

Hope this helps,
Saugy

Entomology (Study of Bugs)

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Ed Saugstad

Expertise

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.

Experience

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.

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

Publications
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.

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

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