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Hi! My apologies to all, I was completely wrong... It can't be Cha obscuritarsis either! Even if some parts of the images are blurred, there are not two pairs of sc but only one on this specimen. So we are back to the pallida group (the key of Shatalkin & Merz, 2010 applies for this group) : Mesonotum entirely yellow/Subscutellum yellow/Abdominal tergites yellow. Palpus yellow, or narrowly brownish apically/Postpedicel mainly yellow, with a darkened dorsal margin ((not yellow as pallida) + Setae on head and thorax brownish yellow (not yellow light as pallida) => Chamaepsila luteola (Collin, 1944)