Thressa cyanescens

Liu, Xiao-Yan, Yang, Ding & Nartshuk, Emilia P., 2011, Species of the genus Thressa Walker, 1860 from China (Diptera, Chloropidae), ZooKeys 129, pp. 29-48 : 41

Thressa cyanescens (Becker, 1916)

Chalcidomyia cyanescens Becker, 1916: 440. Type locality: Taiwan (Holotypes deposited in Hungarian Natural History Museum, Budapest).

Thressa cyanescens (Becker): Sabrosky 1977: 319; Kanmiya 1983: 236; Nartshuk 1993: 114.

Diagnosis.

Thorax entirely shiny black. Legs yellow except fore coxae black, in male fore femora black except distal part yellow; in female, all femora black except distal part yellow. Wing hyaline without a brown spot near wing apex. Epandrium with 2 narrow bands of sclerite along posterodorsal notch. Cercus small with a concavity on ventral margin.

Distribution.

China: Taiwan; Japan.

Remarks.

Becker (1916) firstly described Chalcidomyia cyanescens from Taiwan. Sabrosky (1977) transferred it to Thressa . Kanmiya (1983) newly recorded Thressa cyanescens from Japan, and gave the figures of male genitalia and abdomen lateral view.