Ulidia Meigen

Chen, Xiao-Lin & Kameneva, Elena P., 2009, A review of Ulidia Meigen (Diptera: Ulidiidae) from China, Zootaxa 2175, pp. 42-50 : 43-44

Key to species of Ulidia Meigen from China and bordering countries

(one couplet is included at beginning in order to separate Timia Wiedemann from Ulidia Meigen )

1. Frons usually smooth, not dimpled; thorax with white microtrichia; parafacials usually narrow ... Timia Wiedemann

- Frons dimpled, at least shallowly pitted; thorax without white microtrichia; parafacial wide in some species............. .......................................................................................................................................................... 2 ( Ulidia Meigen )

2. Wing with well-expressed apical spot .......................................................................................................................... 3

- Wing without apical spot .............................................................................................................................................. 7

3. Extension of cell bcu shorter than cell width. Cell c yellow; cell bc and stigma brown. Face and all tarsi yellow. Frons shallowly pitted. Distributed in Russia (Siberia: Krasnoyarsk), Mongolia and China (Nei Mongol or Ningxia) ................................................................................................................................................. U. kandybinae Zaitzev

- Extension of cell bcu as long as cell width. Cells bc, c and stigma brown to black. Fore tarsi black.......................... 4

4. Body with vertex, notopleural triangle and abdominal tergite 1 gray microtrichose, other parts shining black. Head mostly black. Distributed in Mongolia and Kyrgyzstan.............................................................. U. splendida Zaitzev

- Body shining or shagreened, but not microtrichose. Head coloration variable............................................................ 5

5. Halter entirely yellow. Head mostly black, except anterior portion of frons reddish-brown. Tarsi entirely black. Dis- tributed in Mongolia and Kyrgyzstan.......................................................................... U. sp. near melampodia Loew

- Halter with black knob. Head mostly reddish yellow, except occiput partly or entirely black .................................... 6

6. Wing with cell bcu entirely hyaline. Mesonotum shining. Distributed in Kyrgyzstan................ U. melampodia Loew

- Wing with cell bcu having black longitudinal stripe. Mesonotum subshining, shagreened. Distributed in Mongolia. ............................................................................................................................................... U. nigricubitalis Zaitzev

7. Frons dark brown to black, shallowly dimpled. Wing with posteroapical extension of cell bcu moderately long, about 1.0 to 1.2 times the transverse section of vein Cu2. Head not expanded in front, width distinctly shorter than height. Distributed in Europe (except northern), Middle East, Central Asia, China (Xinjiang)..................................... ...............................................................................................................................U. sp. cf. erythrophthalma Meigen

- Frons yellow-brown, deeply dimpled. Wing with posteroapical extension of cell bcu short, less than 1.0 times the

transverse section of vein Cu2. Head expanded in front, width distinctly more than height......................................... 8 8. Parafacial about half as wide as gena ( Fig.1 ). Wing with posteroapical extension of cell bcu about 0.67 times the transverse section of vein Cu2 ( Fig. 5 ). Female cerci laterally with 2 pairs of long setulae ( Fig. 3 ). Distributed in China (Xizang) .......................................................................................................................... U. gongjuensis sp. nov.

- Parafacial almost as wide as gena ( Fig. 6 ). Wing with posteroapical extension of bcu very short, about 0.5 times the transverse section of vein Cu2 ( Fig. 9 ). Female cerci laterally with 4 pairs of long setulae ( Fig. 8 ). Distributed in China (Xizang) .......................................................................................................................... U. xizangensis sp. nov.

Figures

FIGURES 1 – 5. Ulidia gongjuensis Chen, sp. nov. 1. Lateral view of head 2. Front view of head 3. Apex of aculeus in dorsal view 4. Spermathecae 5. Wing.

FIGURES 6 – 11. Ulidia xizangensis Chen, sp. nov. 6. Lateral view of head 7. Front view of head 8. Apex of aculeus in