FIGURE 4 in Two new species of Riethia Kieffer, 1917 from Chile and Ecuador (Chironomidae: Chironominae, Pseudochironomini)

FIGURE 4. Riethia ecuadoriensis sp. nov., male. A—hypopygium, dorsal view; drawn without broad, flattened, apically pectinate setae on inferior volsella; A1—broad, flattened, apically pectinate setae (magnified × 3.5 relative to A); B—hypopygium with tergite IX removed, dorsal aspect to the left, ventral aspect to the right; C—superior volsella, dorsal view.