Mouffetina duopalpus Sutou & Menzel, 2025, sp. nov.

Mouffetina duopalpus sp. nov. Fig. 1 A ‒ D Type material. Holotype. JAPAN • ♂; Honshu, Tochigi Pref., Nikko, near lake Yuno; 36°48'N, 139°26'E; alt. 1500 m; 18 June 2000; K. Uesugi leg.; NSMT. Description. Male. Head: Eye bridge four facets wide. Prefrons with many setae and clypeus bare. Scape brown with 3 anterior setae, pedicel brown with many setae; flagellomeres brown; 4 th flagellomere 2.6 times as long as wide, neck portion about 1 / 8 of its whole length (Fig. 1 A), hairs yellow and almost as long as its width. Palpus yellowish brown, 2 - segmented, 1 st segment with 4 setae on its outside and with distinct brownish sensory area bearing minute sensilla, 2 nd segment with 6 setae (Fig. 1 B). Thorax: Color predominantly brown with dorsocentral and dorsolateral setae on mesonotum; scutellum with many setae; posterior pronotum with setae. Legs predominantly yellowish brown; fore tibial spur about 1.2 times as long as width of tibial apex. Wing membrane bare; distal 2 / 3 of R 5 with both dorsal and ventral macrotrichia, bM bare, r-m with several dorsal macrotrichia, M 1, M 2, and CuA 1 with dorsal macrotrichia, stem of M bare; length of R 1 = 1.3 R, c = 0.8w, r-m = 1.6 bM; stem of CuA very short, almost absent; R 1 ending at same level of branching point of M 1 and M 2; wing length 4.1 mm. Halter brown, knob and distal half of stalk with setae. Abdomen: Tergites and sternites brown with dark brownish setae. Gonocoxite slightly wider than long (Fig. 1 C); gonostylus nearly semicircular in shape with 3 apical spines (Fig. 1 D); tegmen trapezoidal with darkened border (Fig. 1 C); aedeagus distinct (Fig. 1 C). Body size: 3.4 mm. Female. Unknown. Remarks. The name of the new species refers to its 2 - segmented palpus (Fig. 1 B). This species is so far the only Japanese species placed in the genus Mouffetina. The new species resembles M. expolita (Coquillett) which is known from Norway, Far Eastern Russia, Canada, and USA (Alaska, Oregon) (Mohrig et al. 2013). The new species is distinguished from M. expolita by having few apical spines and a more gently curved outline of the gonostylus (Fig. 1 D).