FIGURE 1. Map showing the location of the fossil site near Caergen Village.

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FIGURE 2. Vegetation surrounding Caergen Village and outcrops of the fossiliferous strata. Red mark is the fossil collection location, photo 24 Jul 2015.

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FIGURE 3. Helius (Helius) qinghai n. sp., photography of the holotype No. CNU-DIP-QZ2017001; 1 - body, 2 - male genitalia, 3 - head, 4 - left wing (photo by Siyuan Wu).

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FIGURE 4. Helius (Helius) qinghai n. sp., drawings of the holotype No. CNU-DIP-QZ2017001; 1 - head, 2 - male genitalia, 3 - relation between the length of palpi (p), antenna (a) and rostrum, 4 - wing (a - antenna, fl - flagellomeres, g - gonocoxite, ing - inner gonostylus, oug - outer gonostylus, p - pedicel, pl - palpi, r - rostrum, scp - scapus, t - tergite) (drawings by W. Krzemiński).

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