All that can presently (March 2021) be gleaned about Connie Melnotte from sheet music covers and by Internet searching is that she has been featured on just one work namely:
Twas Only a Drooping Primrose (1888) music by Charles Osborne, words by Edmund Forman and published by Francis, Day & Hunter, London W.C.2, England.
She is also named towards the bottom of a Trocadero Music Hall London, Piccadilly playbill dated March 8th 1890.
Surfers are welcome to contribute any further information about this performer.