Rhipidia (Eurhipidia) formosana formosana Alexander, 1923

Zhang, Xiao & Yang, Yan Li Ding, 2012, Species of the genus Rhipidia Meigen from Taiwan (Diptera, Limoniidae), Zootaxa 3247, pp. 32-42 : 33-35

Rhipidia (Eurhipidia) formosana formosana Alexander, 1923

( Figs. 1–7 )

Rhipidia (Rhipidia) rostrifera formosana Alexander, 1923: 61 . Type locality: Funkiko, Taiwan ( China).

Diagnosis. Male antenna with eleven bipectinate flagellomeres. Pleuron brownish yellow with two conspicuous brown longitudinal stripes. Wing white with brownish black pattern; Sc1 ending just beyond origin of Rs; cell dm open by atrophy of m-m; basal section of CuA1 a short distance beyond fork of M. Clasper of gonostylus with two rostral spines.

Description. Male. Body length 4.5–5.5 mm, wing length 4.5–5.0 mm..

Head ( Fig. 2 ). Black, dusted with grayish white. Hairs on head black. Antenna 1.2–1.3 mm long. Scape brownish black, pedicel brownish yellow, flagellomeres one to eleven grayish white with basal enlargements and branches brownish black, terminal flagellomere brownish black. Flagellomeres one to eleven inclusive with two branches, longest at sixth flagellomere and nearly three times longer than corresponding flagellomere; terminal flagellomere elongate, exceeding penultimate. Proboscis and palpus black, with black hairs.

Thorax. Generally brownish black, dusted with grayish white. Pronotum brownish yellow. Prescutum brownish black with three dark brown stripes. Scutum brownish black, middle area brownish yellow. Scutellum and mediotergite brownish black. Pleuron brownish yellow with two conspicuous brown longitudinal stripes, upper one extending from cervical region to mediotergite, lower one on lower region of katepisternum. Hairs on thorax white. Coxae brownish black; trochanters brownish yellow; femora brownish yellow with a broad brownish black nearly terminal ring; tibiae and tarsi brownish yellow with tips brownish black. Hairs on legs black. Wing ( Fig. 3 ) white with brownish black pattern; major brownish black areas at base of cell R, origin of Rs, tip of R1, and wing tip in cells R1 and R3+4; brownish black stripe along cord to basal section of CuA1; brownish black spots at tip of M1+2, M3, CuA1, CuA2 and A2. Veins brownish yellow. Venation: Sc1 ending just beyond origin of Rs, Sc2 not evident; cell dm open by atrophy of m-m; basal section of CuA1 short distance beyond fork of M. Halter 0.7–0.8 mm, white with knob brownish black.

Abdomen. Tergites and sternites brownish black. Hairs on abdomen white.

Hypopygium ( Figs. 4–7 ). Posterior margin of tergite 9 emarginate, lobes broadly rounded. Gonocoxite with single simple ventromesal lobe. Lobe of gonostylus arched at 2/3 length, suddenly narrowed to apical spine. Clasper of gonostylus, a large fleshy lobe; rostral prolongation small with two slender spines arising from commom tubercle. Paramere with mesal-apical angle brownish yellow.

Female. Body length about 6.2 mm, wing length about 5.3 mm. Similar to male, but flagellomeres peachshaped. Cercus and hypogynial valve brownish black.

Specimens examined. 9 males 3 females (CAU), Taiwan: Yilan, Yuanshan, Fushan Plant Park (635 m), 2010. XI. 12, Ding Yang.

Distribution. China ( Taiwan).

Remarks. For description of this species, also see Alexander (1923).

Figures

FIGURES 1 – 4. Rhipidia (Eurhipidia) formosana formosana Alexander, 1923. 1: Habitus of male, lateral view; 2: Head of male; 3: Wing; 4: Hypopygium, dorsal view. Scale bar: 1 – 3 = 0.5 mm; 4 = 0.1 mm.

FIGURES 5 – 7. Rhipidia (Eurhipidia) formosana formosana Alexander, 1923. 5: Hypopygium, lateral view; 6: Hypopygium, dorsal view; 7: Hypopygium, ventral view. Scale bar: 5 – 7 = 0.1 mm.