Comprehensive Description

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Description (based on three males and one female): Male: length: 22.8–26.0 mm, humeral width: 5.8–6.8 mm. Female: length: 37.0 mm, humeral width: 9.0 mm. Body uniformly reddish testaceous, covered with quite long tawny pubescence. Head narrower than prothorax, completely covered with long pubescence. Eyes protuberant, much more protruding than temples, upper eyelobes closer to each other than lower eyelobes (Fig. 3a). Male (Figs 1a–1b) antennae about one-fifth longer than body, with last two segments surpassing the elytral apex, with antennomeres III-X flattened and bearing a long lateroapical spine; scape stout, without a carina, last antennomere flat and long; relative lengths of segments from base to apex: 12︰3︰25︰32︰33︰35︰36︰35︰40︰38︰69. Female (Figs 2a–2b) antennae about two-thirds of body length, antennomeres III-X flattened and sharply angulate lateroapically; scape expanded, without a carina, last antennomere flat and long; relative lengths of segments from base to apex: 17︰6︰30︰26︰26︰25︰25︰22︰22︰21︰27. Prothorax tapering anteriorly, very finely punctured, with a lateral marginal carina running from base to about apical 1/5 (Fig. 4), anteriorly approaching but not touching procoxal cavity. Elytra densely punctured, much broader than prothorax and three times as long as humeral width; gradually tapering apically, without any carina; apex narrowly rounded. Hind wings (Figs 11–12) have a very complete plesiomorphic venation, medial field with five free veins and a large wedge cell, crossvein r4 without spur. Legs moderately flattened, with dense pubescence; hind femur reaching to second (female) or third (male) abdominal segment; first hind tarsal segment shorter than following two segments combined; apical margin of second tarsomere shallowly emarginate (to 1/10 to 1/5), third tarsomere deeply cleft to 2/3; male and female claws simple. Male terminalia (Figs 5–7): Tegmen length about 3.1 mm; lateral lobes slender, tapering apically, each about 0.6 mm long and 0.15 mm wide, apical half with setae shorter than lateral lobes; tegmen without roof, membranous dorsally; ring converging; median lobe plus median struts slightly curved in apical half, longer than tegmen (about 4︰3); median struts about 5/8 of median lobe’s length; dorsal plate slightly shorter than ventral plate; apex of ventral plate strongly projecting; median foramen not elongated; internal sac without any armature, not distinctly delimited from ejaculatory duct. Tergite VIII (Figs 5a–5b) slightly broader than long, apex rounded. Female terminalia (Figs 8–10): Paraproct long, baculum quite thick; coxite baculi very thick, about one half of the length of paraproct baculi; coxite lobes short, sclerotized except for basal and apical portions, with tactile hairs at the apices (Figs 9–10); stylus apical in position, moderate in size, sclerotized except for apex which bears tactile hairs (Fig. 10); dorsal baculi short and thick; proctiger extremely long, with two pairs of thin baculi, inner pair very long, much longer than paraproct baculi, outer pair less than one third of inner pair’s length. Tignum shorter than abdomen.

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© LIN Mei-ying & BI Wen-xuan

Supplier: Meiying Lin

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