Psychomyia mangshanensis Peng & Sun sp. nov.

Fig. 2A-C

Type materials.

Holotype: China • 1♂; Hunan Province, Chenzhou City, Yizhang County, Mangshan National Forest Park; 24°58.80'N, 112°55.65'E; alt. 730 m; 1-ix-2020; light trap; W. Cao leg.; NJAU Tricho-20200901-0001. Paratypes: China • 10♂; same data as holotype; NJAU Tricho-20200901-0002 to Tricho-20200901-00011.

Diagnosis.

This species is similar to Psychomyia cuspidata Li, Qiu & Morse, 2021 from China (Qiu and Morse 2021). However, P. mangshanensis sp. nov. can be easily distinguished by the following characteristics: (1) each superior appendage has a small triangular protrusion in the middle of the ventral margin in lateral view, which is missing in P. cuspidata; (2) the basal process of each superior appendage is unbranched and with thick spine apically, whereas each superior appendage is two-branched, each branch has a thick spine apically in P. cuspidata; and (3) the phallotheca is slightly wavy at midlength in lateral view but with an obtuse angle in P. cuspidata .

Description.

Male. Length of each forewing 2.8-3.1 mm (n = 10), holotype forewing 3.0 mm. Specimens in alcohol with compound eyes black; body dark brown dorsally and light brown ventrally. Forewings each with forks II-V present, and hind wings each with forks II and V present. Genitalia. Sternum IX subrectangular in ventral, dorsal, and lateral views (Fig. 2A, C). Tergite IX short and triangular in dorsal and lateral views (Fig. 2B, C). Division between tergite IX and segment X indiscernible in dorsal view (Fig. 2B) but distinguished by membrane in lateral view (Fig. 2C). Segment X parallel-sided, same width as apex of tergite IX, apically truncate in dorsal view, digitate in lateral view (Fig. 2C); with several long thick apical setae in dorsal and lateral views (Fig. 2B, C). Superior appendages well developed in lateral view, each tapering from base towards apex, divided into one narrow dorsomesal branch and one broad ventrolateral branch subapically; dorsomesal branch sclerotized and bare, acute in lateral view, ventrolateral branch setose about twice as wide as upper branch in lateral view (Fig. 2C); in ventral and dorsal views (Fig. 2A, B), dorsomesal branches of superior appendages angled mesad, ventrolateral branches curved slightly mesad; paired basal processes of superior appendages tubular, and slender, each with thick spine apically; in lateral view each with base directed dorsad, then recurved posteroventrad and evenly curved caudad (Fig. 2C); in ventral and dorsal views each slightly curving outwards (Fig. 2A, B). Phallobase slender, lanceolate in lateral view (Fig. 2C). Phallotheca tubular, with base produced caudad in lateral view (Fig. 2C), main portion sinuate, with apex hooked dorsad; phallotheca stick-like in ventral view (Fig. 2A), basoventral process plate-shaped, three times wider than main portion of phallotheca. Inferior appendages extending posterolaterad; coxopodites subtriangular, with their bases fused in ventral view (Fig. 2A); subrectangular, about 3 times as long as tall with middle of dorsal margin concave in lateral view (Fig. 2C); harpagones setose, arising from apices of coxopodites, fingerlike (Fig. 2A, C).

Etymology.

Latin feminine adjective Psychomyia mangshanensis, referring to the type locality.

Distribution.

China (Hunan).