Siobla plesia Malaise, 1945

Siobla plesia Malaise, 1945 stat. nov. ( Figs 11–13 View Figure 11 View Figure 12 View Figure 13 )

Siobla sturmii plesia Malaise, 1945: 127 . Type locality: Sichuan, China.

Diagnosis. This species is similar to S. yunanensis , but differs from the latter by the following: mesoscutellum flat. Female: basal three antennomeres with black spots, abdominal sternites yellowish brown; Male: dorsum of flagellum without black stripe, posterior margin of pronotum reddish brown, outer of basal fumer of the hind leg with reddish spot, abdominal sternites reddish brown.

Distribution. China ( Sichuan (Ganzi)).

Primary type examined. 1♀, Lectotype ( USNM, here designated): “ 9 mi. SW of Tatsienlu, Jun 25–7.23, 8500–13000ft ”; “Szechuen CHINA DCGraham”; “Type No. 27440, USNM ”; “ S. sturmii (Kl) , var. plesia n.var. Malaise det. 1936”; “ Siobla plesia , TYPE. Roh.”. 1♂, paralectotype ( USNM, here designated): “ 9 mi. SW of Tatsienlu, Jun 25–7.23, 8500–13000ft ”; “Szechuan CHINA DC Graham”; “Type No. 27440, USNM ”; “ S. sturmii (Kl) , var. plesia n. var. Malaise det. 1936”; “ Siobla plesia , allotype. Roh.”.

Other material examined. 1♀ 1♂, Maiba, Kangding , Sichuan, E101º34.856′, N30º03.631′, 3525 m, 2009-VII-01, Wei Meicai GoogleMaps ; 1♀ 1♂, China, Kangding , 2800 m, Sichuan Prov. 18.VI.1990, F. S. Naito leg., F.S.Huang leg.; Exchange KUK ; 1♀ 1♂, China, Mt. Zheduoshan 3100 m, Sichuan Prov. 21.VI.1990. M. T. Naito leg. M. Takeda leg.; Exchange KUK .

Remarks. Malaise (1945) reported plesia as a subspecies of S. sturmii (Klug, 1817) . Here we treat plesia as an independent species as it is distinct from S. sturmii .

In S. sturmii , the female has following characters: abdominal tergites 2–4 and tergite 9 yellowish brown; pale margin of pronutum narrow; hairs on head and thorax brown; hind tarsi somewhat dark; the male abdominal tergites 2–3 yellowish brown; sternites 5–7 and basal plate black; the female lancet more slender with sharper serrulae, the area below pore line ( aso of Ross, 1945) quite narrow and bent, dorsal margin round ( Figs 13f, h View Figure 13 ); the inner margin of male harpe weakly incised ( Fig. 13j View Figure 13 ); the dorsal margin of the valviceps convex above middle ( Fig. 13l View Figure 13 ).

In S. plesia , the female has follwing characters different from S. Sturmii : abdominal tergites 2–5, and tergites 7–9 yellow ( Figs 11a–c View Figure 11 ); pale margin of pronutum broad ( Fig. 13c View Figure 13 ); hairs on head ( Figs 12a, c, e View Figure 12 ) and thorax ( Figs 13a, c View Figure 13 ) yellowish brown; hind tarsi yellow ( Figs 11a–c View Figure 11 ); the male abdominal tergites 2–4 yellowish brown; sternites 5–7 and basal plate yellow with dark macula ( Figs 11e–g View Figure 11 ); the female lancet less slender with obtuse serrulae, the area below pore line broad and not bent, dorsal margin almost truncate ( Figs 13e, g View Figure 13 ); the inner margin of male harpe weakly convex ( Fig. 13i View Figure 13 ); the dorsal margin of the valviceps convex below middle ( Fig. 13k View Figure 13 ).