Holotype : ♂, China, Tibet, Motuo, Mt. Nanzelama, 1200 m, 23.VI.2018, leg. Qi-Cheng Yang. Paratypes: 2 ♂♂, same date as holotype.

Head mostly yellowish; postgena with a single well-developed seta. Scutum dark yellow, mesonotum with dark brown subtriangular marking. Abdomen dark brown, anterior half of tergite I yellow. Surstylus with four distal tubercules. Pregonite with large distal lobe, distal 3/5 setulose, 1 medial seta.

Male. Body length 3.5 mm, wing length 2.9 mm.

Head (Fig. 1) yellowish, postgena slightly brownish; frons dark yellow; occiput dark yellow in the middle and dark brown on both sides; gena ~ 1/5 as high as eye. Setae and setulae black, ocellar tubercle and anterolateral margins of the frons dark brown. Four fronto-orbitals, hind seta weak. Three genal setae and 1 well-developed seta on postgena. Antenna yellowish, first flagellomere white without infuscation. Arista sparsely short plumose. Palpus light yellow.

Thorax dark yellow, pronotum dark brown anteriorly, mesonotum with dark brown subtriangular marking and anterior extend to prontum, scutellum brown and lateral margins slightly yellow. Prescutellar acrostichal seta present. One postpronotal seta, 2 notopleural setae, 1 presutural supra-alar seta, 3 dorsocentral setae, anterior seta about 1/3 length of posterior seta, 1 postsutural intra-alar seta, 2 postalar setae, 2 later scutellar setae. Prescutellar about 1/3 length of posterior dorsocentral seta. Thoracic pleura light yellow, anepisternum and posterior half of katepisternum dark brown, mediotergite brown dorsally, meron with brown tinge. One anepisternal seta, 1 katepisternal seta. Legs light yellow, coxa white. Wing (Fig. 2) dusky, more heavily infuscated on distal 1/3, along r₂₊₃, the front half of all veins of the whole wing brownish and poster half of veins dark brown, M₁ ratio: distal portion of M₁ (the part beyond Dm-Cu) 5 × as long as Dm-Cu. Halter white.

Abdomen dark brown, anterior half of the tergite I yellow; setulae and setae on abdomen black. Male genitalia (Figs 3–6): epandrium as wide as high; cerci large, oval-shaped, 2 × as high as wide, 1/4–1/2 unified at the base and the rest separated; surstylus 0.5 × length of epandrium, distal 2/3 expanded, 2 × as wide as anterior 1/3; inner and outer faces with sparse setulae, four apical tubercules. Pregonite with large distal lobe, setulose on distal 3/5 , 1 medial seta. Distiphallus long, membranous, with sclerotized bands along length, distally pointed and slightly forked.

Figures 1–6. 

Czernyola luteigenis sp. nov. (male) 1 head, lateral view 2 wing 3 epandrium, cerci, and surstyli, posterior view 4 epandrium, cerci, and surstyli, lateral view 5 hypandrial complex, posterior view 6 hypandrial complex, lateral view. Scale bars: 0.1 mm. Abbreviations: epand – epandrium; cerc – cerci; sur – surstylus; hypd – hypandrium; pregt – pregonite; basph – basiphallus; distph – distiphallus.

Female. Unknown.

China (Tibet).

The specific name refers to the yellow gena.

This new species is somewhat similar to Czernyola varicolor (Sueyoshi), but differs in the surstylus bearing apical tubercules and the pregonite having obvious setae. In C. varicolor the surstylus has no apical tubercules, and the pregonite is without obvious medial setae (Sueyoshi 2006).

Holotype : ♂, China, Yunnan, Xishuangbanna, Mengla County, Menglun, 556 m, 08.VII.2016, leg. Xiao-Li Li . Paratypes: 2 ♂♂, China, Tibet, Motuo, Beibeng, 886 m, 10.VII.2017, leg. Qi-Cheng Yang.

Head brown to darkish brown; first flagellomere entirely white or dark brown. Scutum yellow with brown shield-like marking at middle. Surstylus without tubercles. Pregonite thin, with 3 strong setae nearly equal in length and many microsetulae.

Male. Body length 2.9 mm, wing length 2.4 mm.

Head (Fig. 7) brown, postgena slightly lighter; frons brown; occiput darkish brown; gena ~ 1/6 as high as eye. Setae yellowish and setulae black, four fronto-orbital setae, hind seta short; genal setae and vibrissa thin. Antenna yellowish, first flagellomere yellowish white, pedicel setose with distinctly long setae dorsally. Arista sparsely short plumose. Palpus brown.

Thorax yellow, pronotum with brown spot, mesonotum with large brown medial shield. Prescutellar acrostichal seta absent. One postpronotal seta, 2 notopleural setae, 2 dorsocentral setae, 1 long postsutural intra-alar seta, 1 postalar seta, 2 lateral scutellar setae, 1 apical scutellar seta, 1 long anepisternal seta, 1 katepisternal seta. Scutellum brown, microsetulae on the margin. Mediotergite brownish. Thoracic pleura whitish. Anepisternum and katepisternum brown, with several setulae. Legs yellowish white. Wing (Fig. 8) hyaline, with anterodistal infuscation, 1 hyaline small spot on r₄₊₅, veins brown, M₁ ratio: distal portion of M₁ (the part beyond Dm-Cu) 3.5 × as long as Dm-Cu. Halter white.

Abdomen dark brown, anterior 1/2 of tergite 1 yellow; setulae and setae on abdomen black. Male genitalia (Figs 9–12): epandrium brown, yellowish distally. Surstylus and cerci yellow. Surstylus with sparsely setose outer anterior face, inner face visible posteriorly, without tubercles. Cerci large, setulose, 2 long distal setae of different length. Pregonite thin, with many microchaetae, 2 strong setae nearly equal in length. Distiphallus bending and sac-like distally, consists of many sclerotized parts.

Figures 7–12. 

Czernyola planipalpis sp. nov. (male) 7 head, lateral view 8 wing 9 epandrium, cerci, and surstyli, posterior view 10 epandrium, cerci, and surstyli, lateral view 11 hypandrial complex, posterior view 12 hypandrial complex, lateral view. Scale bars: 0.1 mm.

(China: Tibet): externally as described for pale phase except as follows: head much darker black; antennae dark yellow, first flagellomere dark brown. Scutum dark yellow, with brown shield shape slightly bigger and scutellum dark brown. Mediotergite much darker brown. Thoracic pleura yellowish. Anepisternum and katepisternum brown much darker. Mid and hind leg with femora and tibiae yellower.

Female. Unknown.

China (Yunnan, Tibet).

The specific name refers to the palpus wide, knife-shaped.

This new species is somewhat similar to Czernyola atrifrons (Malloch), but differs in having a yellow scutum with brown markings; in C. atrifrons the head is brown to dark brown, the vibrissa is small and the anterior half of tergite I is yellow (Steyskal and Sasakawa 1966).

Holotype , ♂, China, Shanxi, Fuxian, Ziwuling, 1271 m, 04.VIII.2019, leg. Qi-Cheng Yang. Paratypes, 1 ♂, China, Shanxi, Huangliang, Liuyalinchang, 1120 m, 04.VIII.2019, leg. Qi-Cheng Yang; 1 ♂. China, Shanxi, Fuxian, Ziwuling, 1995 m, 07.VIII.2019, leg. Qi-Cheng Yang.

Head brownish or black, face and most of gena white; antenna white; palpus white. Mesonotum dark brown, with brownish lateral side, yellow to dark brown near both lateral margins. Surstylus without tubercles. Pregonite thin, with 2 strong and 1 small setae and many microchaetae.

Male. Body length 2.8 mm, wing length 2.5 mm.

Head (Fig. 13) brownish or black; face and gena white; gena ~ 1/8 as high as eye, with 4 setae. Setae and setulae yellowish brown, ocellar tubercle slightly bulge. Four fronto-orbitals, hind seta ½ as long as anterior seta. Ocellar seta and postvertical seta nearly equal in length, inner vertical seta as long as outer vertical seta. Vibrissa well-developed. Antenna white, arista sparsely short plumose. Palpus white.

Thorax dark brown or black. Pronotum blackish dark, mesonotum dark brown with both sides brownish, margin yellow to brown, scutum much darker. Setae and setulae on thorax yellowish brown. Prescutellar acrostichal seta present. One postpronotal seta, 2 notopleural setae, 3 dorsocentral setae, anterior seta short; 1 postsutural intra-alar seta; 2 postalar setae, scutellum dark brown, 2 lateral scutellar setae, apical scutellar seta long. Thoracic pleura yellowish. Anepisternum dark yellow, with brownish spot, with 3 to 4 rows of setulae, 2 anepisternal setae, 1 katepisternal seta. Legs white yellowish. Wing (Fig. 14) dusky, more heavily infuscated on distal part along r₂₊₃. Veins brown. M₁ ratio: distal portion of M₁ (beyond Dm-Cu) 4.3 × as long as Dm-Cu. Halter white.

Abdomen dark brown, anterior half of tergite I yellow. Setulae and setae on abdomen black. Male genitalia (Figs 15–18): externally as described for C. planipalpis except as follows: cerci divided, large, setose and with 2 apical setae. Pregonite thin, 2 strong setae of equal lengths, 1 small seta with many microchaetae. Distiphallus sac-like, consists of many sclerotized parts.

Figures 13–18. 

Czernyola shanxiensis sp. nov. (male) 13 head, lateral view 14 wing 15 epandrium, cerci, and surstyli, posterior view 16 epandrium, cerci, and surstyli, lateral view 17 hypandrial complex, posterior view 18 hypandrial complex, lateral view. Scale bars: 0.1 mm.

Female. Unknown.

China (Shanxi).

The specific epithet refers to the type locality.

Czernyola shanxiensis can be separated from other species of this genus by the genitalia, as there are entirely divided cerci, the surstylus is without tubercules, and pregonite is thin, and it has 2 strong setae of equal length,1 smaller seta, and many microchaetae.