Webbolidia magna Nielson 2015, sp. nov.

(Plate 7I, Fig. 444-450)

Description. Length. Male 9.40-10.00 mm., female unknown.

External morphology. Large, robust species. General color dark brown to black; forewings with small, yellow stripes on black veins, cells uniformly dark brown, translucent; mesonotum black; pronotum black, bullae yellow; crown light to dark brown, eyes dark brown; face light brown; clypeus light brown with dark brown, longitudinal stripe on inner lateral margins; clypellus light brown; head narrower than pronotum, anterior margin obtusely rounded; crown broad, about as wide as width of eyes, slightly produced anteriorly, lateral margins convergent basally; pronotum large, nearly twice as long medially as crown, surface bullated; mesonotum large, nearly twice as long medially as pronotum; clypeus long, narrow, lateral margins broadly convex; clypellus narrow, apex flared laterally.

Male genitalia. Pygofer very large, broadly triangulate, glabrous, apex narrowed with digitate lobe apically, caudoventral margin with digitate process (Fig. 444); aedeagus very long, shaft straight in dorsal view, slightly sinuate in lateral view, shaft toothed on apical 1/6, short setae slightly subapical, gonopore near middle of shaft (Fig. 445, 446); dorsal connective long, narrow (Fig. 445); connective large, anterior arms narrowly angled, medial ridge absent, stem large, ovate (Fig. 449); subgenital plate very long, narrow, with long apical spine, sparsely setose along inner lateral margin near apex, sparsely setose subapically on outer lateral margin (Fig. 450).

Material examined. Holotype male. LAOS-N: (Oudomxai), 1-9.v.2000, 1100 m., 20 o 45’N. 102 o 09’E., Oudom Xai, (17 km. nee), Vit Kuban, leg. / Entomological expedition, “Laos 2002”, Moravian Museum, Brno, Czech Republic (MMBC). Additional material: 19 males, same data as holotype (MMBC), 20 males, LAOS: Louang Namtha prov., 21 o 09’N 101 o 19’E., Namtha-Muang Sing, 5-31.v.1997, 900- 1200 m., Vit Kuban, leg. (MMBC, MLBM).

Etymology. The name of the species is descriptive for the large pygofer, subgenital plate and connective and very long aedeagus.

Remarks. From W. kristenseni to which it is similar, W. magna can be distinguished by very long, robust spine on the subgenital plate, a single subapical aedeagal seta (2 in W. kristenseni) and the narrowed apex of the pygofer.