Phasia barbifrons species­group

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320 : 47-48

Key to species of the Phasia barbifrons species­group

(The males of Phasia malaisei , Phasia sichuanensis , Phasia wangi and Phasia frontata and the female of Phasia serrata are unknown)

1. Male .............................................................................................................................. 2

­ Female .......................................................................................................................... 5

2. Genal groove well developed ....................................................................................... 3

­ Genal groove not developed ......................................................................................... 4

3. Antenna long, at least 1/2 facial height, almost reaching vibrissal angle; syncercus deeplynotchedposteriorly;eyesseparatedbyadistancegreaterthanwidthofocellartriangle ....................................................................................... P. bifurca Sun , new species ♂

­ Antenna shorter, less than 1/2 facial height; syncercus shallowly notched posteriorly; eyes separated by a distance less than width of ocellar triangle .................................... .................................................................... P. rohdendorfi (Draber­Mo ń ko, 1965) ♂

4. Surstylus broadly flattened; apex of cercus without sawtooth........................................ ................................................................................ P. barbifrons ( Girschner, 1887) ♂

­ Surstylus not broadly flattened; apex of cercus with sawtooth ...................................... ........................................................................................ P. serrata Sun , new species ♂

5. Sternite VII bent, apex directed ventrally .................................................................... 6

­ Sternite VII straight or slightly bent upward ................................................................ 7

6. Apex of sternite VII strongly bent ventrally; sheath thick ............................................. .............................................................................. P. sichuanensis Sun , new species ♀

­ Apex of sternite VII slightly bent ventrally; sheath thin and canoe­like ....................... ..................................................................................... P. malaisei Sun , new species ♀

7. Eyes touching ............................................................................................................... 9

­ Eyes separated .............................................................................................................. 8

8. First flagellomere long, almost reaching vibrissal angle, 1.6­1.7 times as long as pedicel; distance between eyes equal to width of ocellar triangle ................................. .............................................................................. P. bifurca Sun , new species ♀

­ First flagellomere short, less than 1.5 times as long as pedicel; distance between eyes less than width of ocellar triangle .............. P. rohdendorfi (Draber­Mo ń ko, 1965) ♀

9. SterniteVIIlaterallyflattened,1.8times as longassterniteVI;genalgroovewelldeveloped ........................................................................................ P. wangi Sun , new species ♀

­ Sternite VII dorsoventrally flattened, less than 1.4 times as long as sternite VI; genal groove not developed ................................................. P. frontata Sun , new species ♀