The new species Zagrammosoma dulanenseCao & Zhu, sp. n., from Qinghai Province, China, is described
and illustrated. All type specimens were reared from the pupae of Micrurapteryx sophorivoraKuznetzov
& Tristan (Lepidoptera: Gracillariidae), a leafmining moth attacking the plant Thermopsis lanceolataR.
Br. (Fabaceae). A key to the three knownAsian species of Zagrammosomais provided.All specimens are
deposited in the Insect Collection, the Institute of Zoology, Chinese Academy of Sciences, Beijing, China.