Key to species of Ypsolopha albiramella -group based on female genitalia

(exclusive of Y. albiramella)

1. Signum with one transverse ridge....................................................................... 2

- Signum with two transverse ridges...................................................................... 3

2. Ductus bursae twisted near corpus bursae, signum parallel-sided on posterior half (Fig. 178)............... Y. altissimella

- Ductus bursae not twisted, signum ovate (Fig. 179)............................................... Y. contractella

3. Ductus bursae granulous, corpus bursae rounded (Fig. 173)...................................... Y. minuta sp. nov.

- Ductus bursae not granulous, corpus bursae long ovate...................................................... 4

4. Lamella postvaginalis Y-shaped (Fig. 175)........................................................... Y. helva

- Lamella postvaginalis V-shaped......................................................................... 5

5. Ductus bursae slightly longer than corpus bursae (Fig. 176)................................... Y. brevivalva sp. nov.

- Ductus bursae twice length of corpus bursae or longer....................................................... 6

6. Intersegmental membrane between papilla analis and 8th abdominal segment 2/5 length of abdomen (Fig. 174)............................................................................................... Y. allochroa sp. nov.

- Intersegmental membrane between papilla analis and 8th abdominal segment 3/5 length of abdomen (Fig. 177)............................................................................................ Y. longifloccosa sp. nov.