Scymnus (Neopullus) lycotropus 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 : 165-167

Scymnus (Neopullus) lycotropus Yu , new species

( Fig. 6)

Description. Male. Length 2.25 mm, width 1.30 mm. Form elongate oval with sides nearly parallel, dorsum moderately convex. Head black. Pronotum black. Scutellum dark brown. Elytra brown. Underside black, with elytral epipleura and last 2 sternites of abdomen brown. Legs black. Interocular distance about 1/2 head width. Eyes small, innerocular margins arcuate, distinctly divergent posteriorly. Frons nearly flat, long; anterior margin of clypeus distinctly beyond anterior margin of eyes, very weakly incurvate. Antenna 10­segmented, proportions as illustrated ( Fig. 6f). Maxillary palpus terminal segment 1.6 times as long as wide, slightly divergent apically, length of inner, shorter lateral side less than thickness at base, apex distinctly oblique. Pronotum punctation similar to head. Elyral punctation distinctly coarser, pubescence orientation somewhat anterio­external on basal half, external on apical half. Prosternal carinae narrowly separated, basal 1/3 distinctly convergent, anterior 2/3 nearly parallel. Postcoxal line of first abdominal sternite complete, strongly arcuate, reaching 2/3 sternite length, enclosed area irregularly punctate, smooth near line. Fifth abdominal sternite hind margin nearly truncate, slightly incurvate; sixth sternite U­shaped, hind margin truncate. Genitalia: Sipho ( Fig. 6a) moderately long; siphonal capsule with long inner process and short outer process; apical 1/3 of sipho slightly swollen; sipho apex ( Fig. 6d) simple, without distinct appendix except surrounding membrane. Tegmen ( Fig. 6b, c) moderately stout; median piece of tegmen slightly divergent for basal 1/5, middle 3/5 nearly parallel, apical 1/5 converging to a teat­shaped tip in ventral aspect. Lateral lobes of tegmen slender in ventral aspect, slightly longer than median piece.

Female. Same as male, except hind margin of fifth abdominal sternite slightly round, and hind margin of sixth sternite almost evenly arcuate throughout. Genitalia: Receptaculum seminis and infundibulum as illustrated ( Fig. 6i, m).

Variation. Body length 2.20–2.25 mm, width 1.20–1.30 mm.

Distribution. China (Yunnan).

Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Heyuan (26.8 N, 100.2 E), ( BAAF) . Paratypes: (3 total, same data as holotype except) (1 Ƌ, 1 ♀), Wenbishan, 21­IX­1997, Yu G. leg. (1 BAAF, 1 CAF); (1 ♀), Wenbishan, 24­IX­ 1997, Yu G. collected from Pinus armandii .

Etymology. The name refers to the shape of the sixth abdominal sternite of male.

Remarks. This species has a peculiar color pattern. Its coloration resembles a form of Nephus redtenbacheri Mulsant illustrated by Gourreau (1974), but the two species are easily separated by generic characters, especially male genitalia.

Scymnus (Neopullus) nigromarginalis Yu , new species ( Fig. 7)

Description. Male. Length 2.00 mm, width 1.40 mm. Form oval with sides nearly parallel at middle, gently narrowing posteriorly, dorsum moderately convex. Head including antennae and mouthparts reddish brown, frons darker medially. Pronotum black with anterior margin and anterior corners reddish brown. Scutellum black. Elytra yellowish brown; base black; suture black to 2/3 elytral length, becoming narrower and lighter posteriorly; lateral line black with clear brown border to 2/3 elytral length. Underside including legs dark brown or black, tarsi and abdomen brown. Interocular distance about 1/2 head width. Innerocular margins arcuate. Frons nearly flat, finely punctate. Clypeus apex slightly but distinctly incurvate. Antenna 10­segmented, proportions as illustrated ( Fig. 7g). Maxillary palpus terminal segment nearly parallel­sided, length 1.45 times width, distal side slightly oblique. Punctuation of pronotum similar to head. Elyral punctation distinctly coarser, pubescence orientation weak S­form. Prosternal carinae widely separated, slightly convergent anteriorly. Postcoxal line of first abdominal sternite complete, strongly arcuate, reaching 3/4 sternite length, enclosed area irregularly punctate, smooth near line. Abdomen with fifth sternite hind margin nearly truncate, slightly incurvate; sixth sternite apex broadly, shallowly incurvate, with sparse, short setae. Genitalia: Sipho ( Fig. 7a) moderately long, basal 1/2 strongly curved; siphonal capsule with long inner process and short outer process; apex of sipho ( Fig. 7d) simple, without distinct appendix except exterior membrane. Tegmen ( Fig. 7b, c, and e) moderately stout; median piece of tegmen boat­shaped, widest at middle, distinctly convergent basally and apically, apex with small teat­shaped tip in ventral aspect. Lateral lobes of tegmen distinctly longer than median piece.

Distribution. China (Yunnan).

Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Heyuan (26.8 N, 100.2 E), 23­ IV­1997, Yao D. et al. leg. ( BAAF)

Etymology. The specific name refers to the color pattern of the elytron.

Remarks. The new species resembles S. (N.) camptodromus Yu and Liu 1997 and S. (Pullus) suturalis Thunberg 1795 ( Gordon 1985) . It differs from the former by the black suture marking extending to 2/3 elytral length and the much wider median piece of male tegmen; from the latter by boat­shaped median piece of male tegmen in ventral aspect, and the 10­segmented antennae.