Pseudoscymnus ocellatus 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 : 184-185

Pseudoscymnus ocellatus Yu , new species

( Fig. 20)

Description. Male. Length 2.00 mm, width 1.40 mm. Form oval with sides nearly parallel at middle, abruptly narrowed posteriorly, dorsum moderately convex. Head yellowish brown with dark brown vertex covered by pronotum, clypeus reddish brown; maxillary palpus and flagellum of antenna dark brown. Pronotum black with lateral 1/4 brown. Scutellum black. Elytron black with yellowish­brown oblong ring of uneven width nearer to suture than to lateral margin, less than 1/10 of apex yellowish­brown. Underside black, pronotal epipleuron and abdominal sternites brown. Legs brown, but femora dark brown with paler apex. Interocular distance about 1/2 head width, margins nearly parallel, slightly arcuate. Frons nearly flat, with very fine, dense punctation. Clypeus apex strongly incurvate. Antenna 9­segmented, proportions as illustrated ( Fig. 20l); eighth segment with a long seta. Maxillary palpus terminal segment convergent apically, outer, longer lateral side slightly longer than base. Pronotum punctation similar to head. Elytral punctation distinctly coarser. Prosternal carinae rectangular, widely separated. Postcoxal line of first abdominal sternite incomplete, extending about 3/4 sternite length; enclosed area coarsely punctate, posterior 1/3 smooth. Fifth abdominal sternite hind margin nearly truncate; sixth sternite apex slightly arcuate. Genitalia: Sipho ( Fig. 20a) relatively stout, basal half strongly arcuate; siphonal capsule with long inner process, short outer process; siphonal apex with membrane at inner side. Tegmen ( Fig. 20b, c) stout; median piece of tegmen ( Fig. 20k) widest near base, narrowing gradually to bluntpointed­tip, in ventral aspect. Lateral lobes of tegmen distinctly short, about 1/2 length of median piece, with long setae extending beyond apex of median piece.

Variation. Body length 1.90 to 2.00 mm, width 1.35 to 1.40 mm.

Distribution. China (Sichuan, Shaanxi).

Type Series. Holotype: (Ƌ), Sichuan: Baoxing : (30.3 N, 102.8 E), V­1996, Gao H. leg. ( BAAF) . Paratypes: (2 total) (1 Ƌ, same data as holotype except) Nibagou , 14­X­1996 ( CAF); (1 ♀) Shaanxi: Ningshan: Huoditang (34.0 N, 108.2 E), 8­IV­1998, Yao D. et al. leg. ( BAAF) .

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

Remarks. This species is easily distinguished from all known species of the genus by its peculiar coloration and a long seta on the eighth antennal segment. The genitalia of the male resembles P. shixingiensis Pang (1993) (illustrated in Yu et al. (1993) as Pseudoscymnus sp. ), but differs from the latter by the absence of a dozen small tubercles on the middle of the sipho. It also resembles P. ocelliferus Canepari (1997) , but in the latter species, the pronotum is yellowish red, legs are yellow, and the yellow discal spot on each elytron extends to the suture. We observed P. ocellatus feeding on the hemlock woolly adelgid in the laboratory.