Siemssenius yuae Lee, sp. nov.

(Figs 11 A–11F)

Type locality. Nantou county, Huisunlinchang (惠蓀林場), 24°05’28”N, 121°02’01E, 700 m.

Type material (n= 14). Holotype ♂ (TARI): Nantou: Huisunlinchang (惠蓀林場), 23.IV.2015, leg. Y.- T. Chung . Paratypes: 1♀ (TARI), same as holotype; 1♂, 1♀ (TARI), same locality, 22.IV.2015, leg. B.- X. Guo; 2♂♂, 5♀♀ (TARI), same locality, 26.IV.2014, leg. B.- X. Guo; Hsinchu: 1♀ (TARI), Leedonshan (李棟山), 22.V.2005, leg. Y.- L. Lin ; 1♂ (TARI), Mamei (馬美), 4.V.2008, leg. S.- F. Yu ; 1♀ (TARI), Talulintao (大鹿林道), 22.VIII.2009, leg. Y.- L. Lin; Taoyuan : 1♂, 四陵 [sic!] (四稜, Suleng), 3–5.V.1981, leg. S. Fukuda (SEHU).

Description. Aedeagus concave and narrow, sides subparallel; apico-lateral angles obtusely angulate, wide in lateral view, bases of apico-lateral angles smooth; middle of apical margin with an extremely long, slender tubelike process, slender in lateral view, apex rounded; dorsal process subapically and slightly swollen in dorsal and lateral views, apex pointed in lateral view (Figs 11 A–11B). Ventrite V (Fig. 11 C) not modified in female, apical margin broadly rounded. Gonocoxae reduced. Ventrite VIII (Fig. 11 D) heart-shaped, with extremely short spiculum and dense, elongate setae along apical margins of triangulate processes. Tergite VIII (Fig. 11 E) with apex broadly rounded and dense setae apically. Receptacle of spermatheca (Fig. 11 F) weakly swollen, barely separated from pump, pump much narrower and longer, sharply curved; proximal spermathecal duct long and narrow.

Diagnosis. See diagnosis of Siemssenius jungchani sp. nov.

Host plant. Unknown.

Etymology. This new species is named after Mrs. Su-Fang Yu, a member of the TCRT and first to collect this new species.

Distribution. Widespread in central and north Taiwan (Nantou, Hsinchu, and Taoyuan counties) (Fig. 4).