Sochinsogonia radicalia Feng & Dietrich & Zhang 2018, sp. nov.

Sochinsogonia radicalia sp. nov.

(Figs 2A–L)

Coloration. Crown, prothorax and scutellum light yellow, V-shaped dark brown macula on crown with arms continued onto face along lateral margins of frontoclypeus and merging ventrally to form single median stripe on clypellus. Pronotum with median brown stripe narrowed near middle and broadened posteriorly to cover entire posterior margin, additional pair of small subtriangular black spots near anterior margin. Mesonotum dark brown with large irregular median yellow triangle; scutellum mostly yellow with dark brown border. Forewing black with greenish tinge, apical cells brown, venation orange to brown, with irregular orange marks giving appearance of extra crossveins in basal two thirds. Thoracic pleurites yellow; legs and abdomen stramineous except tarsi brown.

Head. Median length of crown less than ½ transocular width; transition from crown to face with pair of indentations, posterior margin with wide M-shaped arch; ocelli located behind interocular line of anterior eye angles, each equidistant from adjacent anterior eye angle and median line of crown; crown obviously concave between ocelli; antennal ledges slightly protuberant. Face with distinct clypeal muscle impressions; anteclypeus structure as S. multimacula sp. nov. described.

Thorax. Pronotal width much greater than transocular width of head, lateral margins evenly divergent posteriorly; disk sparsely punctate in posterior two thirds. Forewing coriaceous with apical membrane indistinct; four apical cells obvious; base of fourth more distal than bases of other three; first tarsomere slightly longer than combined length of second and third.

Male genitalia. Pygofer with dorsal margin almost straight, posterior margin narrowly rounded, ventral process arising near base and extended to midventral region, apex long and thin. Posteroventral region with sparse macrosetae. Plates extending almost to pygofer apex, with uniseriate macrosetae near median margin, and sparse microsetae around outer margin. Connective Y-shaped, well sclerotized. Style extended well beyond apex of connective, with apex rounded. Aedeagus directed posterodorsally, with a pair of basal processes directing posterodorsally which are parallel to shaft, with significantly curve in basal half; apex erose, extending posteroventrally beyond apex of shaft; with a spine arising on dorsal margin near middle and directed posterodorsally attaining near dorsal margin of shaft.

Measurement. Length of male 12.2-12.6 mm

Material examined. Holotype ♂ (INHS), Philippines, Mt. Kitanglad trail, 08°9.908'N 124°55.959'E, 1773m, 3 May 2012, coll. T. A. Catanach, at light. Paratypes: 2♂ (NWAFU), same data as holotype.

Remarks. This species will run to S. laeta Young in Young's (1986) key to species. It resembles S. laeta as well as S. fimbriata Young, S. grandis Young and S. aniliga Young in dorsal color pattern, but is easily distinguished by the form of the aedeagus, particularly the presence of irregular dorsal serrations on the ventral branch of the aedeagal process. Other species having such serrations either have the process much longer than the aedeagal shaft or lack a dorsal branch arising from the process near its midlength, or both.

Etymology. This new specific epithet is the Latin adjective “ radicalia ” (rootlike) referring to the shape of the processes of the aedeagus.