You can get a butterfly chair for $30 or you can get one for $5,295 (and probably for some other prices in between). This beauty by the Italian leather company Henry Cuir is on display on the first floor at Barneys New York in black woven leather with a gray pillow. Another goodie to file under “cool insect-oriented design”: a collection of striking framed specimens called Pheromones by California-based Christopher Marley; recent arrivals at Barneys.