Scymnus (Pullus) heyuanus 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 : 179-180

Scymnus (Pullus) heyuanus Yu , new species

( Fig. 16)

Description. Male. Length 2.60 mm, width 1.70 mm. Form elongate oval, dorsum moderately convex. Head yellowish brown; pronotum yellowish brown with small black triangular basal marking, extending anteriorly to 4/5 pronotal length; scutellum black; elytra black with apical 1/10 yellowish brown, border between colors distinct, slanted. Underside yellowish brown with prosternal process, meso­ and metathoraces, elytral epipleura, medial basal area of first abdominal sternite black. Legs yellowish brown with middle and hind coxae black. Interocular distance slightly less than 1/2 head width. Innerocular margins arcuate, distinctly divergent posteriorly. Frons nearly flat, coarsely punctate. Clypeus apex weakly incurvate. Antenna 11­segmented, segments 4 to 11 wider than long ( Fig. 16i). Maxillary palpus terminal segment widened distally, distal side distinctly oblique. Prosternal carinae narrowly separated, slightly convergent anteriorly. Pronotum punctation similar to head. Elytral punctures slightly coarse, without rows of coarse punctures along suture; pubescence arranged in strong S­form. Postcoxal line of first abdominal sternite slightly truncate, complete, extending about 3/4 sternite length; enclosed area irregularly punctate, coarser posteriorly. Fifth abdominal sternite hind margin nearly truncate, slightly convex; sixth sternite apex gently arcuate. Genitalia: Sipho ( Fig. 16a) stout, moderately long, basal 3/4 strongly arcuate; siphonal capsule with long inner process, short outer process; siphonal apex ( Fig. 16g) spoon­shaped, with small sclerite in apical membrane. Tegmen ( Fig. 16b, c) stout; median piece of tegmen ( Fig. 16h) widest 1/8 from base, narrowing slightly to 2/3 length, then rapidly to apex; lateral lobes of tegmen slightly shorter than median piece.

Variation. Body length 2.45 to 2.60 mm, width 1.65 to 1.70 mm. Distribution. China (Yunnan). Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Heyuan (26.8 N, 100.2 E), 23­IV­1997 ( BAAF) . Paratypes: (2 Ƌ, same data as holotype except) Wenbishan , 20­IV­1997 (1 BAAF, 1 CAF). Etymology. The name refers to the type locality .

Remarks. This species is similar to S. (P.) chujoi Sasaji (1982b) , but in the latter, the maxillary palpus terminal segment is nearly parallel­sided, the median piece of tegmen is thick in lateral aspect, and the postcoxal line of the first abdominal sternite is evenly arcuate. It is also similar to S. (P.) ferrugatus (Moll.) illustrated by Bielawski (1984), but in the latter the apical 1/5 of the elytron is orange­brown and the apex of sipho has a long thread­like appendix.