Additional bus companies, listed as existing during 1930's, are mentioned in the WPA American Guide Series of state guidebooks.
Suburban and interurban bus companies listed in the Russell's Official National Motor Coach Guide, which was primarily a resource for intercity bus lines.
Cayuga Omnibus Corp. (Auburn to Syracuse, until 1993)
Great Eastern - existed in 1930's, served Syracuse and Niagara Falls.
Syracuse & Eastern Transit Corp. - connected Syracuse with DeWitt, Fayetteville, Janesville.
Utica-Old Forge Transportation Co. - no further information.
Utica-Rome-Claville Co. - no further information.