Oncotympana grandis Lee, 2010, sp. nov.

6. Oncotympana grandis sp. nov.

(Fig. 1)

Type material. Holotype: male (Fig. 1), N. Luzon, CAR border Abra/Kalinga, E. of Malibcong Basiwag, 1,660 m, 17°30.191’N 120°58.942’E, 3–4 IV 2008, J.H. Lourens (IRSNB).

Etymology. The specific name is from the Latin grandis meaning “large” in reference to the large body (28.7 mm long) of this new species, which is larger than its known congeners (25.3 mm at longest).

Measurements of types (in mm, 1 male). Length of body: 28.7; length of forewing: 41.1; width of forewing: 14.3; width of head including eyes: 8.2; width of pronotum: 11.9; wing span: 90.4.

Diagnosis. This species is closely allied to O. pallidiventris as it has a short, wide and obconical male abdomen, but it differs as follows: body much larger (28.7 mm long versus 18.0 mm long in pallidiventris); forewing basal vein of apical cell 1 about one-third (more than half in pallidiventris) as long as longitudinal vein of apical cell 1; forewing with infuscation at bases of apical cells 1–7 and on cubitus anterior 2 (CuA2) (only at bases of apical cells 2, 3, 5 and 7 in pallidiventris); forewing with distinct spot appearing on each hind margin of veins radius anterior 2 (RA2), radius posterior (RP), median veins 1–4 (M1–4) and cubitus anterior 1 (CuA1), forming a series of spots on subapical margin (these spots indistinct in pallidiventris); timbal cover with broad fuscous fascia along posterior margin (without any marks in pallidiventris).

Description of male (Fig. 1). Head green with following black to fuscous marks: median spot enclosing ocelli, with its anterior end not reaching frontoclypeal suture and posterior end reaching posterior margin of head; pair of rather indistinct spots on supra-antennal plates; pair of small longitudinal fasciae between the median spot and compound eyes; pair of small spots between the indistinct spots and the longitudinal fasciae. Supra-antennal plates developed and produced anteriad. Distance between lateral ocelli and compound eyes slightly less than twice the distance between lateral ocelli. Postclypeus slightly swollen. Antenna dark brown to fuscous. Postclypeus green with medial longitudinal black fascia on about posterior half, small reddish ochraceous spot on top of the medial fascia and fuscous fasciae along transverse grooves, which are disconnected before median part. Anteclypeus light green with broad central fuscous patch. Rostrum ochraceous but black apically; slightly passing posterior margin of hind coxae.

Pronotum green. Inner area of pronotum with following black marks: pair of medial longitudinal fasciae broadened near posterior ends but not reaching anterior margin of pronotum; irregular-shaped marks between paramedian fissures and lateral fissures; pair of fasciae along lateral fissures, not complete; pair of curved fasciae along lateral margins of inner area. Pronotal collar margined with black anterolaterally and with pair of brown spots at lateral corners; with posterior marginal area very narrow. Anterior margin of pronotum wider than head including compound eyes. Anterolateral pronotal collar barely dentate.

Mesonotum green to greenish ochraceous with following black to fuscous marks: medial longitudinal fascia suddenly broadened from about middle posteriorly to reach anterior margin of cruciform elevation; pair of small roundish spots enclosing scutal depressions; pair of large obconical paramedian marks falling on submedian sigilla, which are not complete but divided into many small pieces; pair of long obconical sublateral marks falling on lateral sigilla, which are not complete but divided into many small pieces; pair of short fascia along lateral margins; pair of small spots on posterolateral corners. Cruciform elevation brown centrally but green laterally with black anterior subapical parts. Thoracic sternites ochraceous to greenish ochraceous.

Legs greenish ochraceous to ochraceous with some brown parts and black to fuscous marks. Fore-femur with minute subapical spine as well as primary and secondary spines, all black.

Wings hyaline. Forewing tinged with yellowish green especially in basal part. Vein R+Sc mostly greenish brown to brown. Basal vein of apical cell 1 about one-third as long as longitudinal vein of apical cell 1. Infuscation present at bases of apical cells 1–7 and on CuA2. Distinct spot appearing on each hind margin of RA2, RP, M1–4 and CuA1, forming a series of spots on subapical margin of forewing. Base of ulnar cell 1 with black node. Basal membrane and base of hind wing jugum vivid jade green.

Operculum light green; much wider than long, with rounded posterior apex barely reaching posterior margin of sternite II and with posterolateral corner truncate and almost straight. Opercula widely separated from each other.

Abdomen obconical, shorter than distance from head to cruciform elevation. Tergite 2 brown centrally but black laterally. Tergites 3–8 black each with brown caudal margin and medial patch. Tergites 3–7 with pair of sublateral brown patches, which are densely covered with silvery hairs. Posterior margin of tergite 3 much wider than anterior margin of mesonotum. Timbal cover greenish ochraceous with broad fuscous fascia along posterior margin; globose, about 1.7 times wider than long, with anterior inner corner not angled and with posterior inner corner being close to posterior margin of tergite 2. Timbal completely concealed by timbal cover in dorsal view. Abdominal sternites mostly black with narrow ochraceous posterior margin on each of sternites IV–VI.

Genitalia (Fig. 1 C, D): Pygofer barrel-shaped in ventral view. Uncus bifurcate. Uncal lobe hooked outward with apex directed laterad in ventral view, with its inner margin convex at about middle. Dorsal beak narrow triangular, about as long as anal styles. Basal lobe of pygofer absent.

Distribution. Philippines (N. Luzon).

Remarks. This species is also similar to the undescribed species from Mindanao (Endo & Hayashi 1979) as it has a short, wide and obconical male abdomen and similar forewing venation and infuscation, but it differs as follows: mesonotum with greenish marks less developed than black marks (with much developed greenish marks and minimal black marks in the undescribed species); male operculum rather semicircular (rectangular in the undescribed species); timbal cover comparatively small, with its lateral margin slightly protruding (much protruding in the undescribed species) beyond lateral margin of abdominal segment 3 and with its posterior margin not reaching (extending beyond in the undescribed species) median center of abdominal tergite 3.