Epiphragma (Epiphragma) mediale, Mao, Meng & Yang, Ding, 2009

Mao, Meng & Yang, Ding, 2009, New species of the genus Epiphragma Osten Sacken from Yunnan, Southwest China (Diptera, Limoniidae), Zootaxa 2121, pp. 44-56 : 45-47

Epiphragma (Epiphragma) mediale sp. nov.

( Figs. 1 , 6–11 )

Diagnosis. Vertex with one median black line. Wing with conspicuous brown patterning, chiefly ocelliform, without narrow dark brown margin; hyaline areas large. Femora yellow with two dark brown rings, one median, other subapical, longer than yellow tip. Tip of outer gonostylus curved into slender spine. Inner gonostylus relatively longer with tip obtuse. Interbase shorter than gonocoxite, apical half a slender rod bent at 90° angle from thickened base, apical fourth of rod strongly bent inward.

Description. Male. Body length 7.2–9.0 mm, wing 8.0– 9.8 mm.

Head. Brownish yellow. Vertex with one black median line. One median tubercle between eyes. Hairs on head black. Antenna 1.5–1.7 mm. Scape and pedicel brown, flagellum 13-segmented with two basal segments fused, fusion-segment yellow, succeeding segments brown, flagellomeres cylindrical, apical segments elongate, with longer verticils. Proboscis brownish yellow with black hairs; palpus blackish brown with black hairs.

Thorax. General brown with pale gray pollen. Pronotum with one dark brown stripe. Prescutum dark yellow on anterior half, with lateral, humeral and cephalic parts brown; posterior half with four brownish black marks in transverse row, not reaching suture. Scutum brown. Scutellum brownish yellow. Mediotergite brown. One yellow stripe running through katepisternum, katepimeron and metakatepisternum. Hairs on thorax brown. Coxae pale brown; trochanters brown; femora yellow with two dark brown rings, one median, other subapical, longer than yellow tip; tibiae yellow with one spur; tarsi yellow. Hairs on legs black.

Wing ( Fig. 1 ) whitish hyaline, with conspicuous brown patterning, chiefly ocelliform, without narrow dark brown margining. Base of wing brown; two large ocellate circles on anterior half of wing; one pale crossband at midlength of Rs, including supernumerary cross-vein; patterning on posterior half dispersed, each tip of vein with brown spot. Spur at origin of Rs almost obsolete; R2+3+4 longer than R2+3; m-cu just behind 1/3 length of cell dm. Halter 1.3–1.6 mm long, brown except base of stem and apex of knob pale yellow.

Abdomen. Tergites brown, with narrow median brownish yellow line. Sternites pale yellow. Hairs on abdomen brown.

Hypopygium ( Figs. 6–11 ). Posterior margin of tergite 9 ( Fig. 6 ) with subtrigonal lobe on each side of median V-shaped notch. Tip of outer gonostylus ( Fig. 7 ) curved into slender spine. Inner gonostylus ( Fig. 8 ) relatively longer with tip obtuse. Interbase ( Fig. 10 ) shorter than gonocoxite, apical half a slender rod bent at 90° angle from thickened base, apical fourth of rod strongly bent inward.

Female. Unknown.

Type material. Holotype male, Yunnan: Gongshan, Dulongjiang, Kongdang (1500 m), 27°52΄22ʺN 98°20΄20ʺE, 2007. V. 23 (Light trap), Xingyue Liu. Paratypes: 1 male, Yunnan: Gongshan, Dulongjiang (1500 m) 27°43΄21ʺN 98°21΄10ʺE, 2007. V. 21 (Light trap); 2 males, Yunnan: Tengchong, Zizhi villiage (1750 m), 25°43΄44ʺN 98°34΄0 7ʺE, 2007. V. 31, Xingyue Liu.

Distribution. China (Yunnan).

Etymology. The specific name refers to a black median line of the vertex.

Remarks. This new species is somewhat similar to E. dysommatum Alexander, 1965 from India (Assam) in having the similar patterning of the femora, but it can be separated from the latter by the patterning of wing without narrow dark brown margining, spur at origin of Rs almost obsolete and m-cu just behind 1/3 the length of cell dm. In E. dysommatum , the patterning of wing has narrow dark brown margining, the spur at origin of Rs is long and m-cu is just before 1/3 the length of cell dm ( Alexander, 1965).

Figures

FIGURES 1 – 5. Wing (male). 1. Epiphragma (Epiphragma) mediale sp. nov.; 2. Epiphragma (Epiphragma) yunnanense sp. nov.; 3. Epiphragma (Epiphragma) ancistrum sp. nov.; 4. Epiphragma (Epiphragma) breve sp. nov.; 5. Epiphragma (Epiphragma) elongatum sp. nov.

FIGURES 6 – 11. Epiphragma (Epiphragma) mediale sp. nov. Male. 6. Ninth tergite, dorsal view; 7. outer gonostylus, lateral view; 8. inner gonostylus, lateral view; 9. hypopygium, lateral view; 10. hypopygium, dorsal view; 9 t = ninth tergite, aed = aedeagus, gx = gonocoxite, int = interbase, ig = inner gonostylus, og = outer gonostylus; 11. hypopygium, ventral view, 9 s = ninth sternite.