There are other commercial solutions for the capturing of horse-flies on the global market. The TABANOiD Consortium screened available horse-fly trap solutions.
1. Canopy trap for horse-fly control: http://alamance.ces.ncsu.edu/files/library/1/TABANID_Trap.pdf
2. Website of a company selling traps for Horse Flies amongs others: www.bitingflies.com
3. Another horse-fly trap: www.horselineproducts.com/eppsbitingflytra.html
4. How to prepare your own horse-fly trap: http://extension.missouri.edu/publications/DisplayPub.aspx?P=G7013