Cosmopterix vanderwolfi

Thorax and tegulae dark brown with reddish gloss, thorax with a white median line, tegulae lined white inwardly.

Forewing shining dark brown with reddish gloss, four white lines in the basal area, a subcostal from base to one-quarter, slightly bending from costa, a short medial in the centre underneath the end of the subcostal, a subdorsal about as long as the medial, but slightly further from base, a yellow-orange transverse fascia beyond the middle, narrowed towards dorsum, bordered on the inner and outer edge by broad tubercular golden metallic fasciae, the inner fascia almost perpendicular on dorsum, not reaching costa and with a blackish spot subcostally on the outside, the outer fascia inwardly oblique and strongly narrowed at one-third from the costa, lined dark brown on the inside at costa and dorsum, a white costal streak beyond the outer fascia, a white apical line from the distal half of apical area to apex, cilia dark brown around apex, paler towards dorsum.

Underside: forewing shining greyish brown, the white costal streak indistinctly and the white apical line distinctly visible in the apical cilia.

Abdomen dorsally dark greyish brown with reddish gloss, ventrally dark grey, in the middle shining ochreous-white, segments banded shining white posteriorly, anal tuft dorsally dark grey, ventrally ochreous-white.

[1] The species is dedicated to Mr. Hugo van der Wolf, Nuenen, the Netherlands, as one of the participants of the Netherlands Entomological Expedition to the north of Argentina in 1995-1996.