Scymnus (Pullus) yunshanpingensis Yu 1997

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 : 177-178

Scymnus (Pullus) yunshanpingensis Yu 1997 in Yu et al. 1997 (Yunnan).

Distribution. China (Yunnan).

Specimens Examined. Types (4 total), Yunnan: Lijiang: Yunshanpin. Other (17 total), Yunnan: Lijiang: Wenbishan (13), Heyuan (3), Yunshanping (1) .

Remarks. One female has a black, instead of brown, head. This species was abundant on Pinus armandii infested with Pineus sp. This species was found to be a predator of hemlock woolly adelgids in the laboratory and adults laid eggs on hemlock twigs.

Scymnus (Pullus) geminus Yu and Montgomery, new species ( Fig. 15)

Description. Male. Length 2.05 mm, width 1.30 mm. Form oval with sides nearly parallel at middle, dorsum moderately convex. Head brown. Pronotum brown with black rectangular marking at base, nearly reaching anterior margin. Scutellum black. Elytra black with very narrow apical margin brown; each elytron with a pair of opposite comma­shaped reddish brown markings ( Fig. 15n). Underside brown with prosternite and meso­ and metathoraces black. Legs brown with middle and hind coxae, hind femur black. Interocular distance slightly less than 1/2 head width. Innerocular margins almost parallel, slightly arcuate. Frons flat, punctation very fine, dense. Antenna 11­segmented, proportions as illustrated ( Fig. 15j). Maxillary palpus terminal segment with arcuate sides, distal side slightly oblique. Pronotum punctation slightly coarser than on head. Elytral punctation distincly coarser than head, pubescence arranged in strong S­form. Prosternal carinae distinctly convergent anteriorly. Postcoxal line of first abdominal sternite arcuate, complete, reaching about 3/4 length of sternite; enclosed area finely punctate, posterior 2/3 smooth. Fifth abdominal sternite hind margin truncate; sixth sternite apex nearly truncate. Genitalia: Sipho ( Fig. 15a) relatively stout, basal 2/3 arcuate; siphonal capsule with stout outer process, slender inner process; siphonal apex simple, without appendix. Tegmen ( Fig. 15b, c) stout; median piece of tegmen nearly parallelsided for basal 4/5, then narrowing apically with a teat­shaped tip, in ventral aspect. In lateral aspect, median piece with tip slightly curved. Lateral lobes of tegmen distinctly shorter than median piece.

Female. Similar to holotype except head black, pronotum black with anterior margin and corners brown, or with lateral margin brown; fifth abdominal sternite hind margin slightly arcuate, sixth sternite apex evenly arcuate. Genitalia as illustrated ( Fig. 15k, l, m).

Variation. Body length 2.00 to 2.10 mm, width 1.25 to 1.35 mm. Pronotum black with lateral sides brown. Elytron with brown or reddish brown irregular area around small black discal spot ( Fig. 15o).

Distribution. China (Yunnan).

Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Wenbishan (26.8 N, 100.2 E), 23­IV­1997, Yao D. et al. leg. ( BAAF) . Paratypes: (14 total, same data as holotype except) (3 ♀), (1 BAAF, 2 CAF); (1 ♀) , 21­IX­1997, Yu G. leg.; (1 ♀), IV­1996, Yao D. et al.; (1 Ƌ, 2 ♀) , Baishuihe , 21­IX­1997, Yu G. collected on Picea likiangensis ; (4 Ƌ, 2 ♀) , CHINA: Yunnan: Lijiang : Wen Bi Shan, 20­IV–l 2­V­1997, M. Montgomery leg. ( USNM) .

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

Remarks. This species resembles S. (P.) quadrillum Motschulsky and S. (P.) subvillosus (Goeze) in color pattern and body shape, but is quite different in male genitalia. The former is illustrated by Pang and Gordon (1986) as S. (P.) taiwanus Ohta (1929) and the latter by Gourreau (1974). The new species also resembles S. (P.) yemenensis (Kapur) , but the latter has the lighter part of the elytron extending to the apex, and the outer siphonal process shorter and much narrower than the inner process. In the laboratory, adults fed on the hemlock woolly adelgid and laid eggs on hemlock twigs.