Fleischer Studios' websites having a 3 part article on Mr. Bug - Forum.
VoiceTalentBrendan
2016-02-10T17:26:38Z
http://www.fleischerstudios.com/mrbug.html 

[betty] [popeye]
Toadette
2016-02-10T17:39:44Z
Great to see that the Fleischer website is starting to post this rare information, especially that story memo and those concept drawings!