Additional bus companies, listed as existing during 1930's, are mentioned in the WPA American Guide Series of state guidebooks.
White Circle Lines - suburban served Springfield, Thompsonville CT.
Springfield Agawam Airport Lines - served Springfield, Agawam, Southwick, Suffield, Westfield CT.
Aldrich Bus Line - served Ware, Gilbertville, Hardwick.
Dalton-Hinsdale Bus Line - served Dalton and Hinsdale.
Nutmeg Lines - existed in 1930's.