A new species of Dactylolabis subgenus Dactylolabis Osten Sacken, 1860 from China (Diptera, Limoniidae) Author Gao, Shang https://orcid.org/0000-0002-1930-3437 Department of Entomology, College of Plant Protection, China Agricultural University, Beijing 100193, China Author Zhang, Bing Department of Entomology, College of Plant Protection, China Agricultural University, Beijing 100193, China Author Yang, Ding Department of Entomology, College of Plant Protection, China Agricultural University, Beijing 100193, China dyangcau@126.com text ZooKeys 2021 2021-06-28 1047 91 100 http://dx.doi.org/10.3897/zookeys.1047.62033 journal article http://dx.doi.org/10.3897/zookeys.1047.62033 1313-2970-1047-91 DA885E7A397644EE97F7E6991912C71D AFB6568A09F35447B053C130A2418218 Dactylolabis (Dactylolabis) gracilistylus Alexander, 1926 Figs 1-3 , 4-7 Dactylolabis gracilistylus Alexander, 1926: 372. Type locality: China: Zhejiang. Diagnosis. Wing yellowish hyaline, pterostigma brownish. Vein R3 as long as vein R2+3 . Veins R4 and R5 relatively straight. Vein M1 as long as vein M1+2 . Crossvein m-cu located before or near base of cell dm. Posterior margin of 9t with an M-shaped process and a shallow V-shaped notch at middle. Inner gonostylus slender, curved; gonocoxite very elongate and slender, more than twice as long as outer gonostylus. Aedeagus very big, with a shallow V-shaped notch at posterior margin. Redescription. Male ( n = 3). Body length 8.2-8.5 mm, wing length 8.4-8.8 mm, antenna length 1.6-1.7 mm. Head (Figs 1 , 2 ) dark brown with pale gray pollen. Vertex with long setae. Rostrum and palpus brown. Antenna brown. Thorax (Figs 1 , 2 ) mostly dark brown with gray pollen. Pronotum rather long; mesonotum brownish, prescutum dark brown with pale gray pollen. Thoracic pleuron mostly dark brown with dense gray pollen. Legs: coxae brown with gray pollen; trochanters brownish-yellow; femora more yellow at base, brownish-yellow at tip; tibiae brownish-yellow; tarsi brown. Wing (Figs 1 , 3 ) yellowish hyaline, pterostigma more brownish; veins brownish. Venation: Rs long; R2 relatively oblique; R3 as long as R2+3 ; R4 and R5 relatively straight; M1 as long as M1+2 ; m-cu located before or near base of cell dm. Halter (Fig. 1 ) length approximately 1.3 mm, halter stem yellowish; halter brownish. Figures 1-3. Dactylolabis (Dactylolabis) gracilistylus Alexander, 1926, male 1 habitus, lateral view 2 head and thorax, dorsal view 3 right wing. Scale bars: 1 mm. Abdomen (Fig. 1 ) elongated, tergites brownish-yellow, sternites dark brown. Hypopygium (Figs 1 , 4-7 ) dark brown with brownish setae. Surface of 9t with plenty of long setae, posterior margin with an M-shaped process, medially with a shallow V-shaped notch; posterior margin of 9s with plenty of long setae; outer gonostylus cylindrical; inner gonostylus slender, curved; gonocoxite very elongate and slender, more than twice as long as outer gonostylus; aedeagus hyaline, very big, posterior margin with a shallow V-shaped notch. Figures 4-7. . Dactylolabis (Dactylolabis) gracilistylus Alexander, 1926, male 4 hypopygium, dorsal view 5 hypopygium, ventral view 6 aedeagal complex, dorsal view 7 aedeagal complex, ventral view. Scale bars: 1 mm ( 4, 5 ); 0.5 mm ( 6, 7 ). Female. Similar to male ( Alexander 1926 : 372). Material examined. 1 male (CAU), China : Zhejiang , Yuyao , Siming Mountain , 1980.IV.27 , Jikun Yang. 1 male (CAU), China : Zhejiang , Qingyuan , Baishanzu , 1984.IV.19 , Hong Wu. 1 male (CAU), China : Zhejiang , Deqing , Mogan Mountain , 1991.IV.20. Distribution. China (Zhejiang).