Like her brother Brian (the first Wraith), Jean DeWolff's first appearance was in Marvel Team-Up #48 (August 1976):
For those you who weren't alive and reading comic books back in '76, having a female Captain in a major police department wasn't quite as common as it later became. The women's liberation movement only came into prominence back in the late 1960s/1970s. Ms. magazine didn't start publishing until 1972; Virginia Slims cigarettes (which were marketed specifically to females) were introduced in 1968 and in 1976 were using advertisements saying "You've come a long way, baby, to get where you've come to today!"
Jean DeWolff's death was seen in The Spectacular Spider-Man #107 (October 1985).
from The Official Handbook of the Marvel Universe Deluxe Edition Vol. 2 No. 17 (August 1987)