Prominent among Kuo's collection are several rare species found in Taiwan. The Agehana malaho, for instance, a beautiful type having dark brown wings with a white spot and red edges, is the only butterfly known to science that has a pair of rudimentary wings at the base of its thorax.
闊尾鳳蝶生長在台灣的深山裡，翅膀呈黑褐色，後翅中央有一塊白斑，邊緣有一列鮮紅的「弦月紋」，寬闊的尾巴上，貫穿著兩條翅脈﹘ ﹘除了闊尾鳳蝶，世界上沒有第二種尾部有兩條翅脈的蝴蝶。