Metallolophia albescens Inoue

Han, Galsworthy, A. & Xue, 2005, A revision of the genus Metallolophia Warren (Lepidoptera, Geometridae, Geometrinae), Journal of Natural History 39 (2), pp. 165-195 : 173-175

publication ID	https://doi.org/ 10.1080/00222930310001657865
persistent identifier	https://treatment.plazi.org/id/907387D9-C01C-FFD5-FE15-FDACEF82CF84
treatment provided by	Felipe
scientific name	Metallolophia albescens Inoue
status

Treatment

Metallolophia albescens Inoue View in CoL

( Figures 8, 9 View Figures 2–21 , 46, 55, 70)

Metallolophia albescens Inoue, 1992: 156 View in CoL , Figures 14, 19 View Figures 2–21 . Holotype „, China: Chekiang [Zhejiang] (misspelled as ‘Checkiang’ in original description): Wenchow (ZFMK). Metallolophia ostrumaria Xue, 1992: 810 View in CoL , Figure 2595. Holotype „, China: Hunan: Sangzhi: Tianping Shan (IZCAS) syn. nov.

Description

Length of fore wing: „ 21–24 mm; ♀ 25 mm. Frons and palpus brown to blackish brown; female palpus with third segment somewhat elongate; antenna simple in both sexes, all segments shorter than diameter of flagellum in male; abdominal crests metallically glossy, but rather weaker than in type species. Wings of male broader than in type species; outer margin of fore wing not oblique and inner margin of hind wing only slightly elongate. Wing shape of female as in previous species. Pale zone on fore wing distinct, the densely scattered dark streaks fresh violet rather than purplish brown. Discal spots distinctly narrower than in M. opalina (Warren) . The most important difference compared to the previous species is that the postmedian line of the fore wing is nearly straight, though dentate from inner margin to costa. Underside of wings suffused with a pale purplish hue, the subterminal band darker but not clearly defined; discal spots on both wings dark purplish, a small streak in the cell and a large one on the fold proximally to the discal spot on the fore wing.

Male genitalia ( Figure 55 View Figures 53–56 ). Tip of socii a little bent. Valva ample, terminal part of central basal lobe rounded. Saccular process strong, terminal part flattened into an obliquely dentate apex.

Female genitalia ( Figure 70 View Figures 69–74 ). Ductus bursae shorter and broader than in M. vitticosta (Walker) . Corpus bursae pyriform, shorter than the apophyses posteriores.

Specimens examined

China: HOLOTYPE: „, Checkiang [Zhejiang]: Wenchow , June to July 1939, coll. H. Höne ( ZFMK). PARATYPES: 19 „„, same data. 1 „, same locality and collector, July 1939 ( ZFMK); 2 „„, same data ( IZCAS) . Other material: 3 „„, 1♀ (holotype and paratypes of M. ostrumaria Xue ), Hunan: Sangzhi: Tianping Shan , 12 August to 1 September 1981, native collector (2 „„, 1♀ in IZCAS , 1 „ in FSIHP); 1 „, Yunnan: Yongshan , 1400 m, 9 August 1980, coll. Guo Youli ( IZCAS); 1 „, Guangdong: Linping, 23 October 1923, H. Höne; 1 „, China: Canton, coll. H. Höne ( ZFMK) . Vietnam: 2 „„, Mt Fan-si-pan, Chapa , 1500–1800 m, 8–29 May 1993, coll. A. Schintlmeister ( ZFMK) .

Distribution

China: Zhejiang, Hunan, Guangdong, Yunnan; northern part of Vietnam.

Remarks

Specimens from Yunnan, China ( Figures 10, 11 View Figures 2–21 , 56 View Figures 53–56 ) and the northern part of Vietnam are of a slightly larger, distinctly marked form. Length of fore wing in male 25 mm; antenna a little more serrate; discal spots on both wings much smaller than in type series .

Metallolophia purpurivenata Han and Xue sp. nov. ( Figures 12, 13 View Figures 2–21 , 57 View Figures 57–60 , 71 View Figures 69–74 )

Description

Length of fore wing: „ 19–24 mm; ♀ 26 mm. Frons pale brown to brown, vertex white; palpus pale brown to blackish brown; in female third segment of palpus only slightly elongate. Antenna simple but rather thick in both sexes, blackish brown with the dorsal part covered with pale scales. Abdominal crests weakly metallically glossy. Wings with outer margin round and smooth, without crenulations. Ground colour of wings white, with individually variable suffusion of violet colour, but always with prominent scattering of dark purple streaks. Discal spot on fore wing drop-like, that on hind wing small, almost obscured by dense dark purple streaks. Postmedian line dentate, not continuous, consisting of triangular blackish purple teeth on the veins. Underside white, all veins covered with dark purple; base of both wings yellow; a dark purple patch in the cell, close to base, on both wings; fore wing with dark discal spot, and an inconspicuous postmedian band and apical suffusion of dark purple. Discal spot on the hind wing underside absent or very weak.

Male genitalia ( Figure 57 View Figures 57–60 ). Socii wide, with sharp points at tips. Valva produced and weakly angled on the ventral side at middle; central basal lobe expanded, irregularly rounded. Saccular process very thin and small, apical part finger-like, not expanded.

Female genitalia ( Figure 71 View Figures 69–74 ). Ductus bursae not sharply divided from corpus bursae, total length of both about 1.5 times the apophyses posteriores.

Diagnosis

This new species differs from all congeners in that all veins are covered with dark purple on the underside of the wings, and in the extremely small saccular process of the male valve.

HOLOTYPE: „, China: Guangxi: Fangcheng: Fulong , 500 m, 24 May 1999, coll. Zhang Yanzhou ( IZCAS).

PARATYPES: China: 7 „„, 1♀, Guangxi: Fangcheng: Fulong , 300–500 m, 24–25 May 1999, coll. Zhang Yanzhou, Yuan Decheng, Liu Dajun ( IZCAS) . Vietnam: 1 „, Mt Fanzi-pan: Cha-pa , 2400 m, 8–29 May 1993, coll. A. Schintlmeister ( ZFMK) .

Distribution

China: Guangxi; Vietnam.