Arthrotus flavocincta (Hope, 1831) Hope, 1831

Lee, Chi-Feng & Bezdek, Jan, 2013, Revision of the genus Dercetina from Taiwan and their similar species, with description of a new species from Myanmar (Insecta, Chrysomelidae, Galerucinae), ZooKeys 323, pp. 1-33 : 22-23

Arthrotus flavocincta (Hope, 1831) comb. n.

Galleruca flavocincta Hope, 1831: 29.

Monolepta flavocincta : Weise 1924: 168.

Dercetis flavocincta : Maulik 1936: 355.

Dercetina flavocincta : Kimoto and Takizawa 1972: 222 (Nepal); Kimoto 1989b: 229 (Thailand, Laos, Vietnam).

Antipha flavofasciata Baly, 1879: 456; Maulik 1936: 355. (as synonym of Dercetina flavocincta ) synonymy confirmed

Dercetes femoralis Weise, 1922: 97; Kimoto 1989: 229 (as synonym of flavocincta) synonymy confirmed

Type series.

Galleruca flavocincta : Holotype ♀ (BMNH), labeled: "Type (circular label with red border) / Antipha flavocincta Hope Type ( Galleruca ) / Hardwicke Bequest".

Antipha flavofasciata : Holotype ♀ (BMNH), labeled: "Type (circular label with red border) / Assam / Antipha flavofasciata Baly / Antipha flavofasciata Baly Cist. Ent. II p. 56 [on the back] / Baly Coll.".

Dercetina femoralis : Holotype ♂ (NHRS): "Tonkin Montes Mauson / April,May 2-3000' H Frustorfer / femoralis m. / Typus (red label) / NHRS-JLKB 000020341".

Material examined.

INDIA: 2♀♀, Assam, 15.VIII.1918 (BMNH); 1♀, Assam, Jorhat, 3721, coll. H. E. Andrewes (BMNH); 1♀, Darjeeling, Bengal, Debrepani, 6000', 18.IX.1929, leg. J.C.M. Gardner (BMNH); 2♂♂, 1♀, Darjeeling, Bengal, Lopchu, 5000', 21.IX.1929, leg. J.C.M. Gardner (BMNH); 1♀, Mongpoh, Khasi Hills, 2178, coll. H. E. Andrewes (BMNH); 2♀♀, Sikkim (MUHUB); 2♀♀, Simla (MNHUB); LAOS: 1♀, Vientiane Prov., Ban Van Eue, 15.III.1966, leg. Native Collector (BPBM); 1♀, Xiengkhoang Prov., Ban Theuong, 1035 m, 10-17.VIII.1960, leg. R. E. Leech (BPBM); 1♀, Blao (Balao), 500 m, 14-21.X.1960, leg. C. M. Yoshimoto (BPBM); 1♀, Muong Sing, NW of Luang Prabang, 650 m, 6-10.VI.1960, leg. S. Quate & L. Quate (BPBM); THAILAND: 1♀, Chiengmai, 3.XII.1962 (KMNH); 2♀♀, Khao Yai Natioal Park, 800-1000m, 18.VIII.1992, leg. D. Furth (USNM); VIETNAM: 2♀♀, Dalat, 1500 m, 29.IV.-4.V.1960, leg. C. M. Yoshimoto (BPBM); 1♀, Fyan, 1200 m, 11.VII. -9.VIII.1961, leg. N. R. Spencer (BPBM); 1♀, M’Drak, E of BanMeThuot, 400-600 m, 8-19.1960, leg. C. M. Yoshimoto (BPBM);

Diagnosis.

Females of Arthrotus flavocincta are similar to Dercinta unifasciata with antennomere IV much long than III, but differs by more slender antenomeres IV-VII (4.5-5.7 times longer than wide in Arthrotus flavocincta in contrast with 6.0-6.6 times longer than in wide in Dercetina unifasciata ). Males of Arthrotus flavocincta are easily recognized by the similar length of antnnomeres III and IV.

Redescription.

Color (Figs 65-66) bluish black, head, prothorax, coxae, and tibiae yellowish brown; elytra with one transverse white stripe in middle; vertex darkened. Head smooth and impunctate. Pronotum transverse, 2.1 times wider than long, evenly convex on disc and lacking fovea or punctured depression, disc with scattered fine punctures; lateral margin straight, anterior margin slightly concave, posterior margin slightly rounded. Elytra parallel-sided, apex convergently rounded, 1.6 times longer than wide, disc with random punctures, epipleurae smooth and impunctate.

Male. Length 4.3 mm, width 2.0 mm. Antenna filiform (Fig. 76), antennomere II as long as antennomer III, ratio of length of antennomeres III to XI about 1.0: 3.5: 3.4: 3.3: 3.4: 3.3: 3.0: 2.8: 3.4; ratio of length to width of antennomeres III to XI about 2.1: 5.9: 5.7: 5.7: 5.4: 5.2: 4.5: 4.2: 5.4. Penis (Fig. 78) extremely slender, about 9.4 times longer than wide, parallel-sided, basally widened but apically narrowed; apex narrowly rounded; tectum membranous, with dense long setae; weakly curved in lateral view, apex hooked (Fig. 79); endophallic sclerites elongate, about 0.6 times as long as penis, with a cluster of long setae near apex; in lateral view apex curved; from basal 1/3 to apical 1/3 dorsally covered with a pair of longitudinal areas covered by dense setae.

Female. Length 4.4-6.6 mm, width 2.4-3.3 mm. Antenna much shorter than male, comparatively narrower than male (Fig. 77), ratio of length of antennomeres III to XI about 1.0: 1.8: 1.8: 1.8: 1.8: 2.0: 1.8: 1.8: 2.3; ratio of length to width of antennomeres III to XI about 3.1: 5.7: 4.5: 4.6: 4.5: 5.2: 4.9: 5.1: 5.2. Sternite VIII (Fig. 80) weakly sclerotized subapically, apex rounded, setae along lateral and apical margins, spiculum long. Spermathecal receptaculum (Fig. 82) slightly swollen; pump narrow and strongly curved, apex narrowly rounded; spermathecal duct short and wide, shallowly projecting into receptaculum. Gonocoxae (Fig. 81) narrowly connected in middle, extremely elongate, about 6.6 times longer than wide, slightly curved inwards at apical 1/4, with one short setae at apical 1/3, another short setae near apex, six to eight setae at apex.

Color variation. Some specimens have blackish brown meso- and metacoxae, femora, and vertex, or yellowish brown abdomen.

Distribution.

India, Laos, Nepal, Thailand, Vietnam.