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Hello! Oh, I'm not agree whith you : Cha. pectoralis have a mesopleuron yellow-red, sometimes with black triangle on katepisternum, yellow post-pronotal lobe. But here the upper margin of mesopleuron is black, forming a black line beginning narrowly on the upper margin, but widening behind until it meets the dark postnotum below the scutellum, pleurae are largely yellow and postpronotal lobe at least partly are yellow like => Chamaepsila strigata (Collin, 1959)
Jocelyn