Crickets , family Gryllidae ( also known as `` true crickets '' ) , are insects somewhat related to grasshoppers and more closely related to katydids or bush crickets ( family Tettigoniidae ) . Crickets , family Gryllidae ( also known as `` true crickets '' ) , are insects somewhat related to grasshoppers , and more closely related to katydids or bush crickets ( family Tettigoniidae ) .