Helcystogramma trijunctum (Meyrick, 1934) 斜帶陽旋蛾

斜帶陽旋蛾 (Helcystogramma trijunctum)是旋蛾科(Gelechiidae)棕旋蛾亞科(Dichomeridinae)，分布於大陸與台灣。本種前翅為黃褐色底，外緣有一條寬黑色帶，中央有一條黑色斜帶，是本種最重要的鑑別特徵；後翅為淡灰色，無其他翅紋。陽旋蛾屬主要分布於東洋區與新熱帶區，根據李老師(2002)的說法，各種間的生殖器差異不大，翅紋與其他外部形態構造較為穩定。

A Brief Introduction

Helcystogramma trijunctum is characterized by a black tilted line and distributed in China and Taiwan. Compared to other genera, genitalial characters are more conservative and characters of wing pattern are more reliable.

圖/文：施禮正