The Wards Hawthorne bicycles look to be a product built by Snyder Mfg., and likely at their acquired Excelsior plant in Michigan City Indiana, (closer to MW Chicago), if the serial stampings have earlier letters of the alphabet.
The taller was their ‘motobike’ the short called ‘sport motobike’.
The bikes may be called streamlined or semi-streamlined; later Snyder would introduce a motobike frame with a curved down tube, for the fully streamlined look, which continued into the middle 1950’s.
The hanging tank which fits between the parallel bars, would be the more difficult to find of the two. Split tanks from Rollfast bikes are less uncommon.