天华山雪大蚊，动物界-节肢动物门-昆虫纲-双翅目-沼大蚊科-雪大蚊属。Male. Body length 2.5-3.0 mm, wing length 0.3 mm. Head. Brown with brownish yellow hairs. Frons prominent. Antenna 0.7-0.8 mm long. Scape pale brown with extreme tip pale yellow; pedicel pale brown with tip darker; fusion segment (first flagellomere) brownish yellow, flagellomeres 2-6 brownish yellow. Scape subcylindrical; pedicel club-shaped; fusion segment subconical, flagellomeres 2-5 subcylindrical with three long hairs each, last flagellomere short with two long apical hairs. Proboscis and palpus brownish yellow with brownish yellow hairs. Thorax. Pronotum and mesonotum brownish yellow with white hairs. Coxae, trochanters, femora and tibiae yellow; tarsi brownish yellow. Hairs on legs brownish yellow. Wing white. Halter 0.3-0.4 mm long, white. Abdomen. Tergites and sternites brown. Hairs on abdomen white. Genitalia. Posterior margin of tergite 9 with a broadly V-shaped median emargination. Gonocoxite elongate, with long hairs on both