「平山虎灰蝶」分類地位之檢討（鱗翅目：灰蝶科）

Taxonomic Status of Aphnaeus hirayamae Matsumura, 1919 (Lepidoptera: Lycaenidae)

Aphnaeus hirayamae Matsumura, 1919 of Taiwan has been considered a synonym of Spindasis syama (Horsfield, 1829) for a long time. We examined this unique holotype of A. hirayamae and compared it with the specimens of S. syama and Spindasis vulcanus (Fabricius, 1775), and found that characters of the holotype differ from those of S. syama, but are undistinguishable from those of S. vulcanus, which is known mainly from the Indian subcontinent. Accordingly, we assigned Aphnaeus hirayamae Matsumura, 1919 as a synonym nov. to Spindasis vulcanus (Fabricius, 1775). As A. hirayamae has not been found in Taiwan since it was originally described in 1919, it seems unlikely that S. vulcanus (= A. hirayamae) occurs in Taiwan. It is suspected that the holotype of A. hirayamae is more likely a mislabeled specimen of the museum, rather than an individual accidentally introduced to Taiwan. 「平山虎灰蝶」又被稱為平山雙尾燕蝶，過去被認為係三斑虎灰蝶（三星雙尾燕蝶）之同物異名。經檢查其模式標本，發現該標本之形態特徵與三斑虎灰蝶殊異，而與分布於印度、斯里蘭卡等地之南亞虎灰蝶相符，應視為其同物異名。南亞虎灰蝶分布於台灣的可能性不高，因此平山虎灰蝶之模式標本可能係源自意外引入之個體，抑或是錯誤的標籤。