A new species of black fly, Simulium penobscotensis, is described from tributaries of the Penobscot River, Maine, U.S.A. This species is a major late-season biting pest of man. Adults are similar to other members of the subgenus Phosterodoros, but the larvae and pupae are quite distinct. The pupal cocoon is unique because it has a definite collar with no windows on the anterior margin, as do other members of this subgenus.
Snoddy, Edward L.; Bauer, Leah S. 1978. Simulium (Phosterodoros) penobscotensis, a new species of black fly (Diptera: Simuliidae) from Maine, U.S.A. Journal of Medical Entomology. 14(5): 579-581.