Dilar lii, Zhang, Wei, Liu, Xingyue, Aspöck, Horst & Aspöck, Ulrike, 2015

Zhang, Wei, Liu, Xingyue, Aspöck, Horst & Aspöck, Ulrike, 2015, Revision of Chinese Dilaridae (Insecta: Neuroptera) (Part III): Species of the genus Dilar Rambur from the southern part of mainland China, Zootaxa 3974 (4), pp. 451-494 : 487-488

Dilar lii sp. nov.

( Figs. 18 , 98–101 )

Diagnosis. This species is characterized by the sparsely spotted pale forewings, the inflated male ninth gonocoxite which is bifurcated on posterior half, and the incurved and slenderly elongate male tenth gonocoxite.

Description. Male. Body length 3.1 mm; forewing length 6.7 mm, hindwing length 5.8 mm.

Head yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 24 segments, pale yellowish brown, pedicel with brown annular stripes, flagellum unipectinate on most flagellomeres, medial branches much longer than those on both ends, longest branch nearly 5.0 times as long as relevant flagellomere, but branch of 1st flagellomere short and dentate, distal six flagellomeres simple.

Prothorax pale yellowish brown, pronotum yellowish brown, with anterior margin and posterolateral corners pale yellow, medially with a pair of ovoid markings; mesothorax yellowish brown; metanotum pale yellowish brown, slight darker on lateral margins. Legs pale yellowish brown, femora blackish brown at tip. Wings transparent, slightly pale yellow. Forewing ~2.0 times as long as wide, pale yellow, sparsely spotted, marking pattern inconspicuous due to pale coloration; two nygmata present on proximal and median portion of forewing. Hindwing ~2.1 times as long as wide, slightly paler than forewing, with almost no marking; one nygma present at middle. Veins pale yellow, crossveins slightly paler than longitudinal veins. Forewing with trichosors present along wing margin between R and CuP; costal crossveins simple, but occasionally forked; Sc terminally leaving several weak veinlets; Rs with five main branches. Hindwing with trichosors present along wing margin between R and CuP; Rs with four main branches.

Abdomen pale yellowish brown, pregenital segments dorsally yellowish brown. Ninth tergite in dorsal view broad, with an arcuate anterior incision and a nearly U-shaped posterior incision, leaving a pair of wide subtrapezoidal hemitergites, which are densely haired distally ( Fig. 98 ); in lateral view broad ( Fig. 100 ), with straight ventral margin and arcuate posterior margin. Ninth sternite considerably shorter than ninth tergite, arcuately convex posteriad. Ectoproct laterally extend a pair of spinous projections on dorsal surface, posteroventrally with a pair of subsemicircular flattened projections, posterodorsally with a pair of bifid unguiform projections and a pair of short, feebly sclerotized, digitiform projections. Ninth gonocoxite ( Fig. 98 ) inflated, with anterior half broadly spoon-shaped and with posterior half bifurcated; tenth gonocoxite slenderly elongate, with incurved and acutely pointed base and with slightly incurved spinous tip; gonarcus slendely beam-shaped, which is slightly U-shaped, laterally connecting to bases of ninth gonocoxites. Hypandrium internum narrowly trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, CHINA: Guangxi Province, Laibin, Mt. Dayaoshan [24°02'N, 110°19'E], 700 m, 12.VI.1982, Fasheng Li ( CAU).

Distribution. China (Guangxi).

Etymology. This new species is dedicated to Prof. Fasheng Li, who is a famous taxonomist on Psocoptera and Hemiptera in China Agricultural University, for his great contributions on the field collecting of Dilaridae during the past thirty years all over China.

Remarks. This species can be distinguished from the other Dilar species from Guangxi by the small body size and the bright wings, which are almost immaculate. Moreover, it can be distinguished from the other species from Guangxi by the broad ninth tergite, the slightly inflated male ninth gonocoxite, which is bifurcated on posterior half, and the incurved and slenderly elongate male tenth gonocoxite.

Figures

FIGURES 16 – 18. Adults of Dilar spp. 16. D. montanus Yang, male; 17. D. cornutus sp. nov., male holotype; 18. D. lii sp. nov., male holotype. Scale bars: 1.0 mm.

FIGURES 98 – 101. Dilar lii sp. nov. 98. Male genitalia, dorsal view; 99. Male genitalia, ventral view; 100. Male genitalia, lateral view; 101. Male ectoproct, caudal view. Scale bars: 0.5 mm.