Scymnus (Neopullus) lijiangensis Yu, 2000

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 : 164-165

Scymnus (Neopullus) lijiangensis Yu , new species

( Fig. 5)

Description. Male. Length 1.70 mm, width 1.15 mm. Form oval with sides nearly parallel at middle, strongly narrowing posteriorly. Dorsum moderately convex. Head including antennae and mouthparts brown. Pronotum brown, medial base slightly darker. Scutellum brown. Elytra brown with 2 pairs of yellow spots near suture, anterior pair obliquely oval, situated at 1/3 elytral length; posterior pair more circular, smaller, situated between 2/3 elytral length and diameter of spot from apex; apex lighter brown ( Fig. 5p). Underside brown, prosternal process and meso­ and metathoraces dark brown to black; abdominal sternites brown, base of first abdominal sternite darkish brown. Legs brown with middle and hind coxae darkish brown. Interocular distance slightly less than 1/2 head width. Innerocular margins nearly parallel and slightly arcuate. Frons nearly flat, finely punctate. Anterior margin of clypeus very weakly incurvate. Antenna 10­segmented, proportions as illustrated ( Fig. 5i). Maxillary palpus terminal segment nearly parallel­sided, length 1.6 times width, apical side slightly oblique. Pronotum punctation similar to head. Elytral punctation distinctly coarser, pubescence arranged in strong Sform. Prosternal carinae widely separated, slightly convergent anteriorly. Postcoxal line of first abdominal sternite complete, deeply arcuate, reaching 2/3 sternite length; enclosed area irregularly punctate, except posterior 1/3 smooth. Hind margin of fifth abdominal sternite nearly truncate and slightly incurvate; lateral and apical margins of sixth sternite gently arcuate throughout. Genitalia: Sipho ( Fig. 5a) moderately long, basal 1/2 strongly curved; siphonal capsule with long inner process and short outer process; siphonal apex ( Fig. 5d) simple, thread­like, without distinct appendix except exterior membrane. Tegmen ( Fig. 5b, c, f, and g) moderately stout; median piece of tegmen widest at middle, narrowing slightly to base, covnerging apically to a teat­shaped tip in ventral aspect. Lateral lobes of tegmen distinctly longer than median piece, stout in ventral aspect.

Female. Similar to male except elytra have basal 1/2 of lateral margins darker. Maxillary palpus terminal segment slightly convergent apically. Hind margin of sixth abdominal sternite strongly arcuate throughout. Genitalia as in Fig. 5j, k.

Variation. Body length 1.65–1.80 mm, width 1.10–1.20 mm. One paratype has elytra dark brown with one pair yellow spots at 1/3 elytral length, closer to suture than to lateral margin, and the apical 1/3 yellow brown ( Fig.5q).

Distribution. China (Yunnan).

Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Wenbishan (26.8 N, 100.2 E), 20­IV­1997, Yao D. et al. leg., ( BAAF) . Paratypes: (3 total, same data as holotype except) (1 Ƌ), IV­1996; (1 ♀), 18­IX­1997, Yu G. leg. ( CAF); (1 ♀), Heishuiercun, 26­V­1996 .

Etymology. The name refers to the type locality.

Remarks. One ♀ paratype has dark brown elytra with 1 pair yellow marks, at 1/3 elytral length, closer to suture than to lateral margin, and the apical 1/ 3 yellowish brown ( Fig. 5q). The appearance of the other ♀ paratype ( Fig. 5q) resembles Horniolus hisamatsui Miyatake from Hong Kong and H. siamensis Miyatake from Thailand ( Miyatake 1976); however, these Horniolus spp. have the light elytral markings extending to the lateral margins, elytra always with the apex black, and are larger in size (2.6–2.7 mm). Male genitalia of the new species resemble S. (N.) camptodromus Yu and Liu , but the median piece of the tegmen is much shorter.