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

1. Saccus much longer than socius......................................................................... 2

- Saccus as long as or shorter than socius................................................................... 3

2. Inception of ductus ejacuiatorius near base of phallus, cornuti being two large spines (Fig. 126)......... Y. minuta sp. nov.

- Inception of ductus ejacuiatorius far from base of phallus, cornuti inconspicuous (Fig. 127).......... Y. allochroa sp. nov.

3. Uncus a sclerotized band, cornuti with two large thorns (Fig. 128)................................... Y. albiramella

- Uncus and cornuti inconspicuous........................................................................ 4

4. Inception of ductus ejacuiatorius near base of phallus (Fig. 133)..................................... Y. contractella

- Inception of ductus ejacuiatorius far from base of phallus.................................................... 5

5. Phallus granulous on surface (Fig. 132)......................................................... Y. altissimella

- Phallus not granulous on surface........................................................................ 6

6. Valva protruding at 2/3 on dorsal margin (Fig. 129).................................................... Y. helva

- Valva not protruding on dorsal margin.................................................................... 7

7. Valva 1.5 times as long as wide, phallus 1.5 times length of valva (Fig. 130)..................... Y. brevivalva sp. nov.

- Valva twice as long as wide, phallus 1.2 times length of valva (Fig. 131)...................... Y. longifloccosa sp. nov.