What is the Binomial name of the horsefly species that's golden backside

Scaptia Beyonceae.

Explanation:

Scaptia beyonceae is a specie of horse fly discovered in early 1981 but was not actually named until 2011. It is said to be named after hip hop / RnB artist with the name Beyonce. The horse fly species leaves its mouthpart on the body it has stinged.

They also spread blood diseases among their host which includes trypanasoma and filarial worms, especially in sheeps, cattles etc.

Scaptia beyonceae