Scymnus (Scymnus) unciformis Yu

Yu, Guoyue, Montgomery, Michael E. & Yao, Defu, 2000, Lady Beetles (Coleoptera: Coccinellidae) From Chinese Hemlocks Infested With The Hemlock Woolly Adelgid, Adelges Tsugae Annand (Homoptera: Adelgidae), The Coleopterists Bulletin 54 (2), pp. 154-199 : 171-172

Scymnus (Scymnus) unciformis Yu , new species

( Fig. 10)

Description. Male. Length 2.80 mm, width 1.80 mm. Form oval with sides nearly parallel at middle, dorsum moderately convex. Head including antennae and mouthparts brown. Pronotum brown, black basal marking extending anteriorly 1/2 pronotal length. Scutellum black. Elytron black; apical 1/6 yellowish brown, margin with black arched. Underside brown with prosternal process dark brown, meso­ and metathoraces, elytral epipleura, medial anterior margin of first abdominal sternite black. Legs yellowish brown, middle and hind coxae darkish brown. Interocular distance slightly less than 1/2 head width. Innerocular margins nearly parallel, slightly divergent posteriorly. Frons nearly flat, finely, densely punctate. Anterior margin of clypeus very weakly incurvate. Antenna 11­segmented, proportions as illustrated ( Fig. 10g). Maxillary palpus terminal segment slightly divergent apically, length about 1.3 times width, distal side distinctly oblique. Punctation similar on head and pronotum. Elytral punctation coarser, without rows of gross punctures near suture, pubescence weakly sinuous. Prosternal carinae narrowly separated, slightly convergent anteriorly. Postcoxal line of first abdominal sternite incomplete, slightly arcuate, nearly reaching posterior margin, enclosed area line irregularly, finely punctate, posterior 1/3 smooth. Fifth abdominal sternite hind margin nearly truncate; sixth sternite apex slightly incurvate. Genitalia: Sipho ( Fig. 10a) moderately long, S­shaped; siphonal capsule with a long inner process, short outer process; apex of sipho ( Fig. 10f) hook­shaped, simple, without distinct appendix except membrane on interior of hook. Tegmen ( Fig. 10b, c) moderately slender; median piece of tegmen widest at middle, narrowing slightly basally, gradually converging apically to blunt tip, curved upwardly in ventral aspect. Lateral lobes of tegmen shorter than median piece.

Distribution. China (Yunnan).

Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Heyuan (26.8 N, 100.2 E), 29­V­1996 ( BAAF).

Etymology. The specific name refers to the shape of the apex of sipho.

Remarks. The new species resembles the previous species Scymnus (Scymnus) najaformis Yu 1997 , but differs from the latter by the black elytra with apical 1/6 yellowish brown, slender median piece and lateral lobes in lateral view.