Scymnus (Scymnus) paracrinitus 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 : 172-173

Scymnus (Scymnus) paracrinitus Yu , new species

( Fig. 11)

Description. Male. Length width 2.00 mm, width 1.35 mm. Form oval with sides nearly parallel at middle, dorsum moderately convex. Head, antennae, mouthparts brown. Pronotum black with anterior corners, lateral margins brown. Scutellum black. Elytra black. Underside black, except anterior of hypomeron, abdominal sternites brown. Legs dark brown with apical half of femurs, tibiae, tarsi brown. Interocular distance slightly less than 1/2 head width. Innerocular margins nearly parallel, slightly divergent posteriorly. Frons nearly flat, finely punctate; clypeus clypeus apex very weakly incurvate. Antenna 11­segmented, proportions as illustrated ( Fig. 11f). Maxillary palpus terminal segment distinctly divergent apically, distal side strongly oblique. Pronotum punctation similar to head. Elytral punctation coarser, pubescence sinuous. Prosternal carinae narrowly separated, moderately convergent anteriorly. Postcoxal line of first abdominal sternite incomplete, extending 5/6 sternite length to hind margin; enclosed area irregularly punctate, smooth near line. Fifth abdominal sternite hind margin nearly truncate, slightly incurvate; sixth sternite apex evenly arcuate, slightly emarginate at middle. Genitalia: Sipho ( Fig. 11a) moderately long, relatively slender, only basal 1/3 curved; siphonal capsule with curved inner process, stout outer process; apex of sipho ( Fig. 11d) simple, membrane on external side. Tegmen ( Fig. 11b, c) slender; median piece of tegmen short, widest near base, converging gradually to sharp point in ventral aspect. Lateral lobes of tegmen distinctly longer than median piece.

Distribution. China (Yunnan).

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

Etymology. The name is due to the resemblance to S. (S.) crinitus Fürsch.

Remarks. The appearance of this species resembles Pseudoscymnus tsugae Sasaji and McClure (1997) , which is a predator of Adelges tsugae . It differs from the latter by having long, sinuous pubescence on the elytra, a brown head, and brown anterior corners of the pronotum. Male genitalia resemble S. (S.) crinitus Fürsch 1966 ; however, the new species has a narrower body, a pronotum that is black with brown anterior corners, coarser punctures on the elytra, and the male tegmen has a shorter and narrower median piece.