A new species of Anthrenus Geoffroy, A. medogensis Zhou, Háva, Da & Bai, sp. nov., is described from Mêdog County, Xizang Autonomous Region, China. The new species is illustrated and compared with morphologically similar species: A. himalayensis Háva, Wachkoo & Maqbool, A. katrinkrauseae Háva, and A. occultus Háva. It differs from these species in the scale pattern, antennal structure, and male genitalia. Ecological observations and habitat photographs are also provided.