Chabulina onychinalis ( Guenée, 1854 )

Chabulina onychinalis ( Guenée, 1854)

Guenée, 1854 in Boisduval & Guenée, Hist. nat. Insectes (Spéc. gén. Lépid.) 8:205 pl.6, fig.9 ( Asopia ) comb. nov.

= Zebronia braurealis Walker, 1859 List View in CoL Specimens Lepid. Insects Colln Br. Mus. 19: 971.

Type material examined: Asopia onychinalis Guenée, 1854 , [ India]] Côte de Coromandel (lost); Zebronia braurealis Walker, 1859 , Ceylon (abdomen lost) ( NHM).

Additional material examined: ♂: BRIT. INDIA, Ex coll. Swinhoe / Coll. Janse, K. Maes Gen. Prep. nr . ♂ 1064, ABSRC1000131 ;

♀: INDIA, Khasia Hills, Assam, leg. Doherty, ABSRC1000132 ;

♀: LAOS, Luang Prabang, Nong Khiaw Viewpoint Resort. 20°34′05.02′′N; 102°37′08.47′′E. 510m GoogleMaps . MV Light. 29.iv.2019. leg. K. Maes, K. Maes Gen. Prep. nr . ♀ 1857, ABSRC1000563 ; ♂: idem, ABSRC1000567 ;

♀: LAOS, Luang Prabang, outskirts of Luang Prabang. 19°51′49.48′′N; 102°07′22.58′′E. 450m GoogleMaps . MV Light. 28.vi.2019. leg. K. Maes, K. Maes Gen. Prep. nr. ♀ 1860, ABSRC1000564 ;

♂: LAOS, Oudamxay , Nam Kat Yola Pa, inside park area. 20°33′47.19′′N; 102°13′50.23′′E. 750m GoogleMaps . MV Light. 3– 8.v.2019. leg. K. Maes, K. Maes Gen. Prep. nr . ♂ 1861, ABSRC1000565 ; ♂: idem, ABSRC1000575 ; ♂: idem, ABSRC1000577 ; ♂: idem, ABSRC1000898 ; ♂: idem, ABSRC1000899 ; ♂: idem, ABSRC1000900 ; ♀: idem, ABSRC1001288 ; ♂: idem, ABSRC1001294 ; ♀: idem, ABSRC1001295 ; ♂: idem, ABSRC1001296 ; ♂: idem, ABSRC1001297 ; ♂: idem, ABSRC1001298 ;

♂: CHINA, Hong Kong , Kadoorie Agr.Res.St. , Shek Kong Yuen Long, Northern Territories. 22°N; 114°E. 600m GoogleMaps . MV Light. 5.viii.1998. leg. R.C. Kendrick, ABSRC1000862 ; ♂: POLYNESIA, Fiji , Rotuma Island. 12°29′56.11′′S; 177°07′16.62′′E. 23m GoogleMaps . MV Light. 14–26.i.2020. leg. V. Gurko, K. Maes Gen. Prep. nr. ♂ 1977, ABSRC1001639 ; ♂: idem, ABSRC1001663 ; ♀: idem, K. Maes Gen. Prep. nr . ♀ 2118, ABSRC1001664 ; ♂: idem, ABSRC1001663 ; ♀: idem, ABSRC1001665 ; ♀: idem, ABSRC1001674 ; ♀: idem, ABSRC1001675 ; ♂: ABSRC1001676 ; ♂: idem, ABSRC1001677 .

Description:

Head: Frons rounded, maxillary palps close to base labial palps, upturned, black at the base, terminal segment white; labial palps upturned, white with a black streak at the base of the first and second segment; antenna filiform.

Thorax: Forewings narrow triangular with a complicated wing pattern consisting of black lines on a white or whiteyellowish background: antemedian line consisting of two lines: the inner one straight towards the inner margin, outer line forming a large U-shaped line continuing in the reniform stigma and costa, between the lines light yellow scaling; postmedian line rather narrow at costa and with light yellow scaling; hind wing with narrow ante- and postmedian black lines and a limited series of black spots in the postmedian fascia; a small patch of light yellow scaling in the anal region of the antemedian fascia.

Wingspan: 17–21 mm.

Abdomen: White with some black scaling dorsally forming a large “O” and some white scaling limiting the distal edge of the tegumen of each segment.

Tympanal organs: invaginated.

Male genitalia: ( Figs 4–6 View Figure 4 View Figure 5 View Figure 6 ) Typically Glyphodes type genitalia: distal part uncus slender, ventrally with long setae, ventral part long slender on a wide tegumen ventrally as a U-shaped structure with a wide saccus. Valva rounded, rather short, membranous, sacculus with a simple fibula. Valva slightly longer and more pointed as C. astomalis and with a shorter, more slender fibula. Aedeagus tubular, one part sclerotized, vesica with a simple cornutus consisting of about six curved and aligned spines.

Female genitalia: (Figs 8 & 10) Papillae anales with short and long setae; apophyses posteriores rather wide, well sclerotized, of about equal length as apophyses anteriores: ostium narrow calyx-shaped; ductus bursae half width of corpus bursae; the latter long ovoid with a simple bilobed signum composed of multiple small sclerotisations.

Distribution: India and South East Asia, Australia.

Host plant: Nerium species ( Solis, 2008).

Diagnosis:

Ground colour black and white but with some light-yellow scaling between the double postmedian lines near the costa; hind wing with some light yellow scaling near the anal area of the antemedian line ( Fig. 11 View Figure 11 ). Vesica in aedeagus with a simple cornutus consisting of about six curved and aligned spines. Ostium about half the width of its depth.