The beehive was once commonly employed by banks as a symbol of cooperation, productivity, and thrift. (You'll still find them indoors, too.) Sheaves of wheat suggest similar virtues; these bas reliefs may once have adorned a farmers trust or similar financial institution. The first building functions as a bank even today; the prime tenant of the second is a chain drug store.
Sheaves of wheat
First photo: 244 East 86th St. (Second-Third Aves.), Manhattan
Second and third photos: 93-01 Sutphin Blvd. (at Archer Ave.), Jamaica, Queens