Phacelochaeta Norrbom & Sutton & Steck & Monzón 2010

1. Wing (Fig. 55) with apex of vein R 2+3 touching penultimate band or closer to it than to apical band; apical band broad, its proximal margin straight or convex. Band covering crossvein bm-cu at most slightly broadened posteriorly, well separated from apex of vein A 1 +Cu 2. Oviscape setulae pale brown and fine, distinctly darker and thinner than whitish setulae on tergites 2–6....................................................................................................... quinquefasciata (Hendel)

- Wing (Figs. 54, 56) with apex of vein R 2+3 touching apical band or equidistant between it and penultimate band; apical band narrower, its proximal margin concave. Band covering crossvein bm-cu distinctly broadened posteriorly, extended to apex of vein A 1 +Cu 2. Oviscape setulae yellow, similar in thickness and color to setulae on tergites.................................................................................................................................................................................2–62

2. Apex of vein R 2+3 ending in or touching apical band (Fig. 54); apical band widely separated from penultimate band along posterior wing margin..................................................................................................... obliqua Norrbom, n. sp.

- Apex of vein R 2+3 equidistant between apical and penultimate bands (Fig. 56), these bands sometimes narrowly connected along posterior wing margin...................................................................................... quinquevittata (Norrbom)