Thagria oldfieldi NIELSON 2013, sp. nov.

Thagria oldfieldi, sp. nov.

(Plate 2E, Figs. 94–100)

Length. Male 10.80 mm; female unknown.

External morphology. Large, robust species (specimen slightly teneral). General color tannish with numerous light brown markings. Crown ivory with 2 short light brown stripes below middle, ocelli black; eyes dark brown; pronotum light brown with ivory bullae; mesonotum tannish with 2 light brown triangulate markings on anterior margin, 4 irregular shaped markings below; forewings tannish, translucent, with numerous light brown markings (Plate 2E); face tannish, with short transverse rows of brown lines on each side of middle of clypeus, light brown patch below, light brown stripe bordering lora next clypellus. Head distinctly narrower than pronotum, anterior margin sub conical; crown very broad, wider than eye width, produced distally about 1/3 entire length, lateral margins convergent basally, disk depressed medially; eyes large, elongate ovoid; pronotum large, nearly ½ times longer than crown, surface bullated, mesonotum large, slightly longer than pronotum; forewings typical; clypeus very broad in anterior half, constricted medially, lateral margins rounded in posterior half; clypellus short, narrow, base narrower than clypeus at juncture of clypeal suture, slightly inflated mediobasally, apex slightly expanded laterally.

Male genitalia. Pygofer in lateral view with caudoventral lobe long broad medially, caudodorsal margin with pair of long, digitate processes (Fig. 94); segment X ventral processes absent (Fig. 94); aedeagus in dorsal view symmetrical, very long, exceeding midlength of ventral paraphysis (Figs. 95, 96); ventral paraphysis in dorsal view symmetrical long, broad basally, tapered to apex, without processes (Figs. 9, 96); style in dorsal view very long, exceeding apex of ventral paraphysis, with large subapical lateral tooth, apex toothed on inner lateral margin (Figs. 97, 98); connective typical; dorsal connective in dorsobasal view broadly U shape, rami extremely slender, stem absent, rami attached to base of segment X (Fig. 99); subgenital plate with tuft of long microsetae apically (Fig.100).

Material examined. Holotype male, Vietnam, Tam Dao Mts. June 1991, V. Novotny, (B1), (273 SP) (Brit. Mus., 1994, 21) (BMNH)

Etymology. The patronymic is named in honor of Dr. George Oldfield for his significant contributions in the fields of leafhopper vector research and Acarology.

Remarks. This species has a rare, toothed apical style. It is the only species that has this feature among the group possessing a flat, narrow clypellus with symmetrical aedeagus and ventral paraphysis which will separate this species from them.