Xylocopa tabaniformis, the horsefly-like carpenter bee or mountain carpenter bee is a species of carpenter bee in the family Apidae. It is found in Central America, North America, and South America. It is long and black. Males have yellow hair on the thorax.

Subspecies: These 10 subspecies belong to the species Xylocopa tabaniformis:

• Xylocopa tabaniformis androleuca Michener, 1940
• Xylocopa tabaniformis azteca Cresson, 1878
• Xylocopa tabaniformis illota Cockerell, 1919
• Xylocopa tabaniformis melanosoma O´Brien & Hurd, 1963
• Xylocopa tabaniformis melanura Cockerell, 1918
• Xylocopa tabaniformis orpifex Smith, 1874
• Xylocopa tabaniformis pallidiventris O´Brien & Hurd, 1965
• Xylocopa tabaniformis parkinsoniae Cockerell, 1917
• Xylocopa tabaniformis sylvicola O´Brien & Hurd, 1965
• Xylocopa tabaniformis tabaniformis Smith, 1854