Dichomeris lushanae Park & Hodges, 1995 廬山棕旋蛾

廬山棕旋蛾(Dichomeris lushanae)是旋蛾科/麥蛾科(Gelechiidae)棕旋蛾亞科(Dichomeridinae)lushanae種群的成員，目前僅知分布於臺灣。本種的前翅為褐色底，中室有兩枚黑斑，較靠中室頂端的黑斑較長；後翅為灰白色，無其他翅紋。棕旋蛾屬的介紹請參考本網誌文章─Dichomeris bucinaria 藍紋棕麥蛾；lushanae種群的成員共有3種分佈於台灣。廬山棕旋蛾翅紋雖然簡單，但在臺灣產的棕旋蛾屬中僅有D. loxospila的翅紋也是除黑點外無其他特別顏色或斑紋，而兩者可由以下特徵區分：後者的斑紋為中室靠翅基的黑斑較長，與前者恰好相反。在檢視文獻後，筆者發現江西棕旋蛾(Dichomeris jiangxiensis)所圖示之正模雄蟲生殖器與本種特徵幾乎完全吻合，推測為本種之次同物異名。Park & Hodges在1995年的研究裡一共檢視了7份各地的廬山棕旋蛾標本，牠們分別來自臺北松山(正模)、新竹觀霧、南投廬山、蓮華池、梅峰、臺南關仔嶺與高雄chiahsien，圖中個體則來自南投仁愛。

A Brief Introduction

Dichomeris lushanae represents one of the 32 Dichomeris species in Taiwan and shares similar wing pattern with D. loxospila: relatively simple wing pattern with brownish ground colour and two dark spots on forewing. The former species could be distinguished from the later by a longer dark spot on the tip of cell. This wing pattern is also shared by some species of Lecithocera (Lecithoceridae), and scales on labial palpa are a useful charater to identify them.

References

Park KT and Hodges RW, 1995. Gelechiidae (Lepidoptera) of Taiwan III: systematic revision of the genus Dichomeris in Taiwan and Japan. Insecta Koreana. 12: 1-101.
王效岳、朴奎澤和有田豊，2000. 認識台灣的昆蟲20: 長角蛾科、穀蛾科、麥蛾科和其他一些小蛾類。252頁。台北市：淑馨出版社。(P70)