Anyone with a larger collection than mine: I found this list online. Can this really be all of the pre-Crisis Parasite stories?
Action Comics #340 (first story) [August 1966]
Action Comics #361 (first story) [March 1968]
Action Comics #555 [May 1984]
DC Comics Presents #55 [March 1983]
Supergirl (second series) #20 [June 1984]
Superman (first series) #299 [May 1976]
Superman (first series) #369 [March 1982]
World's Finest Comics (first series) #247 (first story) [October/November 1977]
World's Finest Comics (first series) #270 (first story) [August 1981]
The Parasite also appeared in:
Superman #286 (April 1975)
Superman #304 (October 1976)
World's Finest Comics #246 (August-September 1977)
Superman #319 (January 1978)
Superman #320 (February 1978)
Superman #321 (March 1978)
Superman #322 (April 1978)
Superman #331 (January 1979)
Action Comics #578 (April 1986)
That is, apparently, the complete list of his appearances in your list and this one.
So in other words, I've got a LOT of work to do when I finally get around to writing the Parasite's entry in
Supermanica. :shock: