Species of the genus Thressa Walker, 1860 from China (Diptera, Chloropidae) Author Liu, Xiao-Yan Author Yang, Ding Author Nartshuk, Emilia P. text ZooKeys 2011 129 29 48 http://dx.doi.org/10.3897/zookeys.129.1144 journal article http://dx.doi.org/10.3897/zookeys.129.1144 1313-2970-129-29 Thressa beckeri (de Meijere, 1913) Hemisphaerisoma politum Becker, 1911: 47. Type locality: Taiwan (Syntypes deposited in Hungarian Natural History Museum, Budapest) Chalcidomyia beckeri de Meijere, 1913: 292. Thressa beckeri (de Meijere): Sabrosky 1977 : 319; Spencer 1986 : 609; Nartshuk 1993 : 117. Diagnosis. Postpedicel narrow and elongate, 3 times longer than wide.Legs yellow, but entire femora yellow in male; black centrally in female. Wing hyaline with a brown spot near wing apex. Abdomen entirely dark, bluish black. Distribution. China: Taiwan; Indonesia; Philippines; Australia. Remarks. Becker (1911) firstly described Hemisphaerisoma politum from Taiwan and gave the figure of the head. De Meijere (1913) transferred it to Chalcidomyia , and gave the new name, Chalcidomyia beckeri ( Chalcidomyia politum preoccupied by Chalcidomyia polita de Meijere (1910) ). Thressa beckeri (de Meijere) was treated as synonymy with Thressa punctifera (de Meijere) from Java by Duda (1934) , but Sabrosky (1977) accepted them as two distinct species.