Uncle Dave: Two years late, but here's an answer.

"Some Little Bug Is Going to Find You" (not "Get You" as in Arkie's post of lyrics) was written in 1915; words by Benjamin Hapgood Burt and Roy Atwell, music by Silvio Hein. You can find it on the CD "Moonlight Bay: Songs as Is and Songs as Was" (1998) by Joan Morris and William Bolcom. Joan mostly recites rather than sings this song, but you can pick out the tune from Bill's playing. There are also MP3s available of Billy Murray's recording (1916). See http://www.archive.org/details/somlitbug1916