Collecting expeditions to China's Sichuan, Gansu and Qinghai provinces were conducted by the third author, along with Alessandro and Irene Floriani, during June 2009, April 2010 and July 2010. Light trapping yielded numerous noctuid moths including four new species, described herein. These new taxa reflect the high diversity of some genera (Hada, Billberg, 1820 ; Palaeamathes, Boursin, 1954) in SW China, and the biogeographical connections of the Tibetan Plateau to Central Asia (Lacanobia kitokia sp. n., L. contrastata (Bryk, 1942), L. mongolica Behounek, 1993, L. kirghisa Gyulai & Ronkay, 1998) and to the Himalayan Region (Palaeamathes serrulata sp. n. is close to P. harpegnoma (Hreblay & Ronkay, 1998). Acronyms for personal and institutional collections are as follows: AFM—Alessandro Floriani (Milan, Italy); ASV—Aidas Saldaitis (Vilnius, Lithuania); BJ—Janos Babics (Budapest, Hungary); DNK—Danny Nilsson (Kalvehave, Denmark); GRB—Gabor Ronkay (Budapest, Hungary); GBG/ZSM—Gottfried Behounek (Grafing, Germany) / Zoologische Staatssammlung, München (Germany); GYP—Peter Gyulai (Miskolc, Hungary); HHP – Henri Hoppe (Klein Pravtshagen, Germany); NRCV—Nature Research Centre (Vilnius, Lithuania); WSM—Wolfgang Speidel (München, Germany).