Blacus ( Tarpheion ) tanae, Lu & Chai & Achterberg & Tang & Chen, 2024

Blacus ( Tarpheion) tanae sp. nov.

( Figs. 31–32 View FIGURE 31 View FIGURE 32 )

Material examined. Holotype: ♀, China, Yunnan, Tengchong, Houqiao , 1.VI.2009, Tan Jiangli, No. 200906276 ( ZJUH) . Paratypes: 6 ♀♀, China, Yunnan, Xianggelila, Hutiaoxia , 7. VI .2009, Tan Jiangli, No. 200906270, 200906271; Yunnan, Bao Mtn, Lujiangba , 9. V .2009, Wang Manman, No. 200902540, 200902551; China, Fujian, Wuyi Mtn, Tongmu, 15. IV.2009, Tan Jiangli, No. 201602543; Wuyi Mtn , Sangang , 15. IV.2009, Wang Manman, No. 201605941 ( ZJUH) .

Description. Female. Length of body 2.0 mm, length of fore wing 2.2 mm.

Head. Antennomeres 20; length of first flagellomere 1.45 × length of second flagellomere; length of first, second and penultimate flagellomere 6.4, 4.4 and 3.25 × their width, respectively; length of maxillary palp 1.3 × height of head; occipital carina complete ( Fig. 32A View FIGURE 32 ); frons slightly depressed medially, nearly flat; OOL: diameter of posterior ocellus: POL = 17:6:7; length of eye in dorsal view 2.25 × length of temple; face smooth, densely setose, temple glabrous; malar suture present, length of malar space 1.5 × basal width of mandible.

Mesosoma. Length of mesosoma 1.4 × its height; side of pronotum smooth dorsally, remainder coarsely reticulate ( Fig. 32G View FIGURE 32 ); carinae of middle lobe of mesoscutum subvertical and subhorizontal; precoxal sulcus complete, with some short striae ( Fig. 32G View FIGURE 32 ); notauli complete, crenulate-rugose, wide and deep ( Fig. 32D View FIGURE 32 ); mesoscutal lobes setose, middle lobe slightly concave anteriorly; scutellum smooth, its lateral carina complete, not protruding apically; surface of propodeum smooth between carinae, its medial area distinctly widened dorsally.

Wings. Fore wing: first discal cell widely truncate anteriorly; vein r vertical ( Fig. 32F View FIGURE 32 ), length of vein r 1.2 × width of pterostigma; 1-CU1:2-CU1 = 1:4.

Legs. Hind coxa smooth dorsally, with an oblique dorsal carina; length of femur, tibia and basitarsus of hind leg 7.5, 14.0 and 10.8 × their width, respectively; fore claws with long bristles ( Fig. 32I View FIGURE 32 ), middle claws with one bristle, hind claws simple.

Metasoma. Length of first tergite 3.1 × its apical width, slightly widened apically, superficially rugose apically ( Fig. 32E View FIGURE 32 ); second tergite with coarse, longitudinal striae and remainder smooth ( Fig. 32E View FIGURE 32 ); length of ovipositor sheath 0.15 × length of fore wing.

Colour. Reddish-brown; four basal antennomeres, frontal head, palpi, all legs yellow; tegulae, remainder of antennomeres (but subapically pale brown), ovipositor and its sheath, veins, pterostigma, metasomal tergite and hypopygium brown; parastigma and base of pterostigma white; bristles of fore claws blackish, one bristle of middle claws yellow; wing membrane subhyaline.

Variation. Length of first tergite 2.6–3.1 × its apical width; length of eye in dorsal view 2.1–2.25 × length of temple; length of fore wing 1.9–2.2 mm; length of ovipositor sheath 0.14–0.17 × length of fore wing.

Male. Unknown.

Biology. Unknown.

Distribution. China ( Yunnan, Fujian).

Etymology. The specific name tanae refers to the name of its collector, Prof. Tan Jiangli.

Notes. The new species is similar to B. ( T.) apicalis van Achterberg, 1976 because precoxal suture is complete and having some striae, second tergite with coarse, longitudinal rugae, vein r of fore wing subvertical, and 4 basal antennomeres yellowish, but differs by having mainly subvertical carina of middle lobe of mesoscutum (subhorizontal in B. ( T). apicalis ), apical antennomeres of antenna pale brown (yellowish-white), fore claws with long blackish bristles, middle claws with one yellow bristle (all claws simple), length of body 2.0 mm ( 1.5 mm), length of fore wing 1.9–2.2 mm (about 1.5 mm), length of the first tergite 2.6–3.1 × its apical width (2.1–2.3 ×), and length of eye in dorsal view 2.1–2.25 × length of temple (1.9 ×).