Atrichopogon (P.) myrmedon Kieffer, 1922

(Figs. 1 F, 1M, 1U, 2G, 3)

Atrichopogon myrmedon Kieffer, 1922: 155 (description of female and male, Taihoku - 10 females and 1 male). Blech & Rohlfien 1987: 221 (in SDEI holotype female, 5 female paratypes, Taihoku, Sauter 1912).

Atrichopogon (Psilokempia) quadrispinosus Remm, 1993: 196 (male, female, figs, Far East of Russia). Syn. nov. Atrichopogon (Psilokempia) pectinacaudalis Yu & Yan, in Yu et al. 2006: 457 (female, China). Syn. nov.

Diagnosis. The only species within the subgenus Psilokempia with single, finger-like caudomedian process of female sternite VII. Eyes pubescent. Proximal flagellomeres spherical. Fifth palpal segment conical. Wing membrane with few macrotrichia at apex. Paratergite bearing 1 seta. Scutellum with 4 bristles.

Description. Female. Body uniformly yellowish. Eyes pubescent, narrowly fused for distance of 2 ommatidia. Proximal flagellomeres spherical (Fig. 1 M), AR 1.62. Fifth palpal segment conical (Fig. 1 F), mandible with 11 teeth. Wing with 5–20 macrotrichia at apex, length 0.80–0.92 mm, CR 0.67–0.71. Second radial cell 2.3–2.4 times longer than first (Fig. 2 G). Paratergite with 1 seta. Scutellum with 2 large submedian setae and smaller. Sternite VII with single, finger-like caudomedian process. Sternite VIII with 7 strong blunt spines. Sternite IX with small spines (Fig. 3). Seminal capsule single, ovoid, neck very short, 0.070–0,080 mm long (Fig. 1 U).

Male. Similar to female, with usual sexual differences (Remm 1993).

Material examined. Lectotype female, present designation, labeled as follows: Taihoku, Formosa, H. Sauter 1912, paratypus, Atrichopogon myrmedon, Kieffer det.; paralectotype female, labeled as follows: Taihoku, Formosa, H. Sauter 1912, Holotypus, Atrichopogon myrmedon, Kieffer det. Paralectotype female, Taihoku, Formosa, H. Sauter 1912, 7 XI.

Discussion. Kieffer’s original descriptions do not mention the labels „ holotype or „ paralectotype associated with the two preserved specimens, which we treat as syntypes. The better-preserved specimen is designated as the lectotype here. The unique ventral armatures of female genitalia of A. myrmedon (Fig. 3), A. quadrispinosus (Remm, 1993), and A. pectinicaudalis (Liu et al. 2006) are identical. Consequently, A. quadrispinosus and A. pectinicaudalis are considered new junior synonyms of A. myrmedon . New synonymies.