Notes on Melolonthinae (Coleoptera: Scarabaeidae) from China: a new species of the genus Miridiba and new records

A new species of the genus Miridiba Reitter, 1902, M. yingjiangensis sp. nov. , is described from the Yunnan Province, China. The genera Laotrichia Keith, 2007 and Siamophylla Keith, 2005, along with the species L. cuccodoroi Keith, 2007 and S. grootaerti Keith, 2005 are recorded from China for the first time. Six species of the subfamily Melolonthinae are also recorded from China for the first time: Cyphochilus obscurus Sharp, 1876, Lepidiota acuminatops Prokofiev, 2015, Lepidiota cochinchinae Brenske, 1894, Malaisius siamensis Li et Yang, 1999, Malaisius mollis Arrow, 1941, and Pedinotrichia magna (Itoh, 1995). The female of M. mollis is described and illustrated for the first time.