Figures 1-6 from: Mao-Fa Y, Yang Z, Yu J (2012) Two new species of Oxycera (Diptera, Stratiomyidae) from Ningxia, China. ZooKeys 198: 69-77. https://doi.org/10.3897/zookeys.198.2624 - Yang, Zai-Hua (2012)