2. ERIOCRANIIDAE

Hindwing with hair-scales in discal area; this scaling is thin, not wholly covering wing membrane

Hindwing with elliptic or very elongated scales in discal area, covering most of wing membrane (less in worn specimens)

2 (1)

Antenna two-fifth length of costa forewing. Forewing with tornal spot reaching to two-fifth across wing, sometimes obsolete or absent

Eriocrania cicacitrella (part)

See couplet 8.

Antenna three-fifth length of costa forewing. Forewing with tornal spot reaching more than halfway across wing, sometime obsolete or absent.

3 (2)

Vertex with hair-scales from greyish to blackish brown, sometimes mixed with a few isolated pale hair-scales

E. sangii (part, male)

9.0-14.0mm. Mid March to late April. Paramere of aedeagus (a long dorsal process) relatively narrow, tapered, pointed at apex and without spines in apical area (to be examined without dissection if aedeagus with paramere are sufficiently extended). Maxillary palp with apical segment usually indented. Forewing purplish with scattered bright blue and shining golden scales, sometimes without markings. For female see couplet 4.

Vertex with mixed dark and whitish hair-scales

Paramere of aedeagus relatively broad, with short point and with spines in apical area. Maxillary palp with or without indentation. Forewing with more or less distinct golden markings apically.

4 (3)

Forewing with tornal spot and other golden markings weak or obsolete, notably in female. Hindwing with very long hair-scales (180µm)

E. semipurpurella

9.5-18.5mm. Early April to early May. Forewing comparatively broad; purplish with scattered bright blue and shining golden scales. Maxillary palp without indentation apically.

Forewing with tornal spot and other golden markings usually distinct. Hindwing with shorter hair-scales (120µm)

E. sangii (part, female)

9.0-14.0mm. Mid March to late April. Forewing elongate; purplish with scattered bright blue and shining golden scales. Maxillary palp usually indented apically. Antenna less than half length costa forewing. For male see couplet 3.

5 (1)

Forewing shining golden, usually with scattered purple and blue scales; tornal spot pale golden and indistinct. Antenna three-fifth length costa forewing

D. subpurpurella

9.0-14.0mm. Late March to early June. Forewing elongate. Vertex with mixed whitish and dark hair-scales.

Forewing purplish or golden strigulated and suffused purple; tornal spot more or less distinct. Antenna one-half length costa forewing or less

6 (5)

Forewing purplish, more or less sprinkled golden; a conspicuous narrow, slightly curved silvery white tornal spot, reaching to about half across wing

E. unimaculella

9.0-11.5mm. Mid March to early May. Vertex dark greyish brown, somewhat mixed pale greyish. Forewing very elongate.

Forewing golden, strigulated and sometimes partly suffused purple; tornal spot pale golden, reaching to about half across wing or less

7 (6)

Forewing with tornal spot reaching half across wing, well-marked. Hindwing with dorsal cilia greyish, pure white in basal half

E. salopiella

9.0-12.0mm. Mid April to early May. Forewing golden, strongly strigulated (not reticulated) and often partly suffused purple with scattered bright blue scales; cilia golden or purplish grey, on tornal spot whitish. Vertex with mixed greyish brown and paler hair-scales.

Forewing with tornal spot reaching to about two-fifth across wing, sometimes obsolete. Hindwing with dorsal cilia greyish, often paler is basal half, but not white

Forewing rather short and broad; cilia more or less barred pale and dark, or dark, but paler on tornal spot.

8 (7)

Forewing with cilia more or less barred grey and whitish

E. sparrmannella

9.0-13.0mm. April and May. Forewing rather short, golden, strongly reticulated purple with irregular crosslines of bright blue scales. Vertex with mixed dark greyish brown and whitish hair-scales.

Forewing with cilia unicolorous pale golden greyish

E. cicatricella

7.5-13.0mm. Late March to early May. Forewing elongate; pale shining golden, strigulated and partly suffused deep purplish. Vertex dark greyish brown, somewhat mixed pale greyish. See couplet 2.