Dilar megalopterus Yan

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 : 477-479

Dilar megalopterus Yan g

( Figs. 12 , 68–71 )

Dilar megalopterus Yang, 1986: 154 . Type locality: China (Yunnan: Dongchuan).

Diagnosis. This species is characterized by the broad wings with small and scattered pale spots, the male ninth gonocoxite proximally inflated with bifid unguiform tip, and the straightly elongate male tenth gonocoxite, which is slightly longer than ninth gonocoxite.

Description. Male. Body length 5.2–6.6 mm; forewing length 12.8–15.8 mm, hindwing length 10.5–12.9 mm.

Head yellowish brown, with pale yellow setose tubercles. Compound eyes blackish brown. Antenna with ca. 28 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 4.0 times as long as relevant flagellomere; branch on 1st flagellomere short and dentate, distal six flagellomeres simple.

Prothorax brown, pronotum yellowish brown, with anterior margin and posterolateral corners slightly paler, medially with a pair of ovoid markings; mesothorax yellowish brown, mesonotum dark brown on anterior and lateral margins; metanotum pale yellowish brown, slightly darker on lateral margins. Legs pale yellowish brown, femora blackish brown at tip. Wings broad, transparent, with several pale spots. Forewing ~2.0 times as long as wide, with small and scattered spots; two nygmata present on proximal and median portion of forewing, median one much larger than the other one near wing base. Hindwing ~2.1 times as long as wide, slightly paler than forewing; one nygma present at middle. Veins pale brown. 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 four 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 dark brown. Ninth tergite in dorsal view with an arcuate anterior incision and a deeply V-shaped posterior incision, leaving rather narrow median portion and a pair of subtrapezoidal hemitergites, which are obtuse distally and densely haired ( Fig. 68 ); in lateral view broad ( Fig. 70 ), with arcuate posterior margin. Ninth sternite much shorter than ninth tergite, truncately posteriad. Ectoproct in dorsal view terminally with a pair of bifid unguiform projections curved ventrad, in ventral view medially with a pair of flattened projections and a pair of bifid unguiform projections. Ninth gonocoxite ( Fig. 68 ) proximally inflated, with bifid unguiform tip; tenth gonocoxite straightly elongate, slightly inflated at tip which is with a small unguiform projection; gonarcus slender, nearly W-shaped, laterally connecting to base of ninth gonocoxites. Hypandrium internum nearly trapezoidal, with lateral margins slightly arcuate.

Female. Unknown.

Materials examined. Holotype ♂, CHINA: Yunnan Province, Dongchuan, Shaziba [26°12'N, 103°01'E], 29.VI.1980, Zhen Duan ( CAU). Paratype 1♂, CHINA: Yunnan Province, Dongchuan, Shaziba [26°12'N, 103°01'E], 29.VI.1980, Zhen Duan ( CAU).

Distribution. China (Yunnan).

Remarks. See Remarks under D. dongchuanus Yang.

Figures

FIGURES 10 – 12. Adults of Dilar spp. 10. D. yangi sp. nov., male holotype; 11. D. dongchuanus Yang, male holotype; 12. D. megalopterus Yang, male holotype. Scale bars: 1.0 mm.

FIGURES 68 – 71. Dilar megalopterus Yang. 68. Male genitalia, dorsal view; 69. Male genitalia, ventral view; 70. Male genitalia, lateral view; 71. Male ectoproct, caudal view. Scale bars: 0.5 mm.