Common Cattle Grub
Scientific name: Hypoderma lineatum (Villers)
Facts: The common cattle grub or heel fly is a hairy fly 1/2 inch long, or about the size of a honey bee. The front, sides, and back of the head are covered with yellowish white hairs. Adult mouthparts are small (reduced). Larvae have hooks as mouthparts for tearing flesh. Larvae tunnel through the bodies of cattle and form lumps in the backs of the cattle before adult flies emerge.