Clitostethus wenbishanus 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 : 158-159

Clitostethus wenbishanus Yu , new species

( Fig. 1)

Description. Male. Length 1.70 mm, width 1.20 mm. Form oval, with sides slightly arched, moderately more curved posteriorly, dorsum moderately convex. Color brown, except: mouthparts and antennae yellowish brown; frons yellowish white; pronotum yellowish brown with anterior 2/3 yellowish white; elytra reddish brown, slightly lighter posteriorly with apex narrowly yellow; underside yellow, subgena and gula brown; prosternal process and meso­ and metathoraces dark brown to black; abdominal sternites brown with yellow on apical sternites; legs yellow. Interocular distance slightly less than 1/2 head width. Innerocular margins strongly arcuate. Frons finely punctate. Clypeus distinctly produced anteriorly, apex very slightly incurvate. Antenna 11­segmented, proportions as illustrated ( Fig. 1g). Maxillary palpus terminal segment divergent distally, length 1/2 width, apical side slightly oblique. Pronotum punctation similar to head. Elytral punctation coarser; pubescence oriented backward with indistinct wave pattern near apex. Prosternal carinae widely separated, distinctly convergent anteriorly. Postcoxal line of first abdominal sternite incomplete, reaching hind margin of sternite. Area surrounded by line finely punctate, except posterior 1/2 smooth. Hind margin of fifth abdominal sternite truncate, sixth sternite apex broadly arcuate throughout. Genitalia: Sipho ( Fig.1a) moderately long, basal 1/2 curved; siphonal capsule with long inner process and short outer process; apex of sipho ( Fig. 1b) with 2 membranes. Tegmen ( Fig. 1c, d) moderately stout; sides of median piece of tegmen parallel for basal 3/4, then narrowing uniformily to pointed tip in ventral view. Lateral lobes of tegmen about 1/3 length of median piece, with a few long setae at tip.

Type Series. Holotype: (Ƌ), Yunnan: Lijiang: Wenbishan (26.8 N, 100.2 E), 13­X­1996 ( BAAF).

Etymology. The name refers to the type locality.

Remarks. Peng et al. (1998) described three new species from Hainan Island and provided a key to these species and C. sternalis (Pang and Gordon) . That key is based solely on the male genitalia and these characters are used in the above key beginning with item 3. Additional characters that distinguish the new from the previously known species include its lighter coloration, the very short terminal segment of the maxillary palpi, and the short lateral lobes of the tegmen with long setae at the tip.