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TaxonomyBrowseInfoImagesLinksBooksData
Photo#62321
T. sulcrifrons or abdominalis? - Tabanus sulcifrons - female

T. sulcrifrons or abdominalis? - Tabanus sulcifrons - Female
Lake Wales, Polk County, Florida, USA
June 30, 2006
Size: 18 mm
This horse fly has much wing coloring like sulcrifrons, but abdomen doesn't seem right. The white triangles on the abdomen surely are a clue, but the other color markings are confusing. Help! :)

photo
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wonderful image; thanks

imageminder

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Checked my reference materials
and concluded that this is sulcifrons.
Individuals of T.abdominalis, T. gladiator, T. limbatinevris,T. nefarius, T. sucifrons and a 'late-season' Carolina form 'T. sulcifrons' are a difficult group to identify to species.

 
Thanks
Tony, thank you so much for your ID expertise and help. These are very difficult to distinguish. I don't have a reference except for bugguide! :) If the photos are correct and show nice clear angles, then I can make a determination for myself, yet I know often times this isn't engough since genetalia and other characteristics should be considered. Good enough for an amateur though. I'm learning.

 
Scott
There are many scientific publications dealing with tabanids; most of which deal with only one state. The one I have for Florida may be available from used-book dealers:
Jones, C.M. & D.W. Anthony. 1964. The Tabanidae (Diptera) of Florida. Technical Bulletin No. 1295. Agr. Res. Service, USDA. 85 pages. Has keys to species, comments on species, and general biology.
The best I have for T. sulcifrons is:
Burger, J.F. 1980. Redescription and lecotype designation of Tabanus sulcifrons Macquart (Diptera:Tabanidae), and comparison to related taxa. Proc. Entomol. Soc. Wash. 82:660-667. You may be able to get a copy from Dr. Burger, Dept. of Entomology, University of New Hampshire, Durham, NH 03824.
Incidentally, that's an excellent image.

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