Three new Cryptochetum Rondani, 1875 (Diptera: Cryptochetidae) from Yunnan Province, China and an identification key to Chinese species Xi, Yuqiang Yin, Xinming European Journal of Taxonomy 2020 2020-02-14 605 605 1 15 9HTM7 Yin, 2020 Yin 2020 [555,935,479,506] Insecta Cryptochetidae Cryptochetum Animalia Diptera 3 4 Arthropoda species euthyiproboscise sp. nov.   Figs 1–7    Diagnosis Ocellar triangle approximately in isosceles triangle, apical angle shorter than the distance between antennae. Surstylus slightly narrowed and sharp apically.    Etymology The species epithet refers to the straight palpus.    Type material   Holotype   CHINA• ♂; Yunnan, Tengchong, Zizhi; 25°44′24″ N, 98°33′36″ E; alt.  2100 m;  31 May 2007; Yan-L. Lileg.; EMHAU CR101.   Paratypes   CHINA: 2 ♂♂, Yunnan, Mangshi, Zhefang; 24°15′36″ N, 98°15′29″ E; alt.  1200 m;  4 Jul. 2014; Wei Zhangleg.; EMHAU DICR0013.    Description MALE. Body length: 2.2–2.4 mm; wing length: 2.6–2.8 mm. HEAD. Darkish brown ( Fig. 1); ocellar triangle shiny brown with metallic luster ( Fig. 2), approximately in isosceles triangle, apex slightly flat; lunule strap-shaped, very narrow, brown. Eye red, bare, 1.8 × as high as long, gena approximately ⅛ of eye height. Setae and setulae on head black; ocelli darkish yellow, placed close together. Ocellar triangle with short setulae, punctures at bases of setulae conspicuous; frons without setae, orbital setae lacking; postvertical setae erect, considerably stouter and longer than other setulae on vertex. Antenna brown with microtomentum, large, same length as face; scape and pedicel with black setulae at middle and margin; postpedicel with pubescence, irregularly rectangular, front margin straight, apical margin curved, 0.5 mmlong, 0.2 mmwide, apical angle with stout conical tubercle, a little longer than surrounding setulae. Proboscis flat and straight, brown, with short sparse black setulae, labellum slightly wide. Palpus short, ca 0.2 mmlong, apically rounded, darkish brown with short dense black pubescence, margin with short sparse setulae.   Figs 4–7.  Cryptochetum euthyiproboscise sp. nov., holotype, ♂ (CR101). 4. Dorsal view. 5. Lateral view. 6. Dorsal view. 7. Lateral view. Scale bars: 4–5 = 0.1 mm; 6–7 = 0.05 mm. THORAX. Shiny, darkish brown with brownish stripes and metallic blue-green luster; scutellum shiny, blackish brown. Setae and setulae on thorax black, punctures at bases of setulae deep and numerous; scutellum large, approximately triangular, wide and rounded apically, 0.5 × as long as thorax. Apical setae longer and stouter than other setae. Anepisternum brown with setulae, katepisterunum and anepimeron brownish, bare. Legs slender, blackish brown except tarsi yellowish. Setae and setulae on legs black. Wing hyaline with greenish and purplish reflections, unspotted, 2.3 × as long as wide; veins brown; costal vein (C) extending to end of R 4+5and terminating at apex of wing; subcostal vein (Sc) weak, slightly angulated; R 1curved, not angulated, R 2+3and R 4+5parallel for 4/ 5along their lengths, then diverging to wing margin; r-m short; M 1between r-m and dm-m 1.5 × as long as dm-m, dm-m slightly sinuous, forming an angle nearly at 90° with M 4, distal portion of M 4(the part beyond dm-m) 1.9 × as long as dm-m ( Fig. 3). Calypter brownish, with brownish microtrichae, margin with brownish setulae. Knob of haltere dark brown, stalk brown. ABDOMEN. Brownish black with a metallic blue-green luster, wide and slightly flattened. Setae and setulae on abdomen black. Male terminalia: epandrium ( Figs 4–5) reduced to thick band dorsally, with sides broadest in middle, with setulae; surstylus slightly narrowed and sharp apically; cercus rather large, with dense setulae. Hypandrium ( Figs 6–7) n-shaped; gonopods small and symmetric; phallus slender, distipallus slightly wide.   Female Unknown.    Distribution  China( Yunnan).    Remarks This new species is somewhat similar to  C. kunmingense Yang & Yang, 1996, but may be separated from it by M 1between r-m and dm-m 1.6 × as long as dm-m; distal potion of M 4(the part beyond dm-m) 1.9 × as long as dm-m. In  C. kunmingense, M 1between r-m and dm-m 1.2 × as long as dm-m; distal potion of M 4(the part beyond dm-m) 1.4 × as long as dm-m ( Yang & Yang 1996). 2565883804 2007-05-31 EMHAU Yan-L. Li China 2100 25.74 Zizhi 21 98.560005 Tengchong 3 4 CR101 1 1 Yunnan holotype 2565883805 2014-07-04 EMHAU Wei Zhang China 1200 24.26 Zhefang 21 98.25806 Mangshi 3 4 DICR0013 2 2 Yunnan paratype