Rhipidia (Rhipidia) triarmata ( Alexander, 1930 )

Zhang, Xiao, Li, Yan & Yang, Ding, 2014, A review of the genus Rhipidia Meigen from China, with descriptions of seven new species (Diptera, Limoniidae), Zootaxa 3764 (3), pp. 201-239 : 236-238

Rhipidia (Rhipidia) triarmata ( Alexander, 1930)

( Figs. 86–90 )

Limonia (Rhipidia) triarmata Alexander, 1930: 514 . Type locality: Hassensan, Taiwan ( China).

Diagnosis. Male antenna with eight bipectinate flagellomeres. Pleuron brownish yellow without conspicuous stripe. Wing grayish white with mostly combined brown spots; combined spots very extensive and almost obliterating lighter areas; spots along anterior margin darker and on wing tip relatively dispersed; Sc1 ending near one-third length of Rs, basal section of CuA1 proximad of fork of M. Lobe of gonostylus with three rostral spines.

Description. Male. Body length 6.0 mm, wing length 5.5 mm.

Head (fig. 87). Brownish black, dusted with grayish white. Antenna (fig. 88) about 1.7 mm long. Scape and pedicel brownish black, flagellomeres one to nine pale yellow with basal enlargements and branches brownish black, remaining flagellomeres brownish black. First flagellomere stout basally; each of flagellomeres two to nine inclusive with two branches which are the longest at sixth flagellomere and nearly twice as long as corresponding flagellomere; flagellomeres ten and eleven enlarged but not pectinate; terminal flagellomere longated, exceeding penultimate. Proboscis and palpus brownish black.

Thorax (fig. 86). Generally brownish yellow to brown, dusted with grayish white. Pronotum brown. Prescutum brownish yellow with three brown stripes. Scutum, scutellum and mediotergite brownish yellow to brown. Pleuron brownish yellow. Coxae brownish yellow; trochanters pale yellow; femora, tibiae and tarsi yellow. Wing (fig. 89) grayish white; all cells with mostly combined brown spots; combined spots very extensive and almost obliterating lighter areas; spots along anterior margin darker and on wing tip relatively dispersed; veins brown. Venation: Sc1 ending near one-third length of Rs, Sc2 near its tip; basal section of CuA1 proximad of fork of M. Halter 0.8 mm long, pale yellow with knob slightly darker.

Abdomen. Tergites and sternites brownish black.

Hypopygium (fig. 90). Posterior margin of tergite nine gently emarginate. Gonocoxite with a single simple ventromesal lobe. Clasper of gonostylus arched at 2/3 length, suddenly narrowed to an apical spine. Lobe of gonostylus moderate-sized; rostral prolongation long with three long spines near midlength. Paramere with mesoapical lobe blackened, tip acute.

Female. Unknown.

Specimens examined. Holotype male (USNM), China: Taiwan, Hassensan (1372–1829 m), 1929. VIII. 30, S. Issiki. One antenna, one wing, one leg and abdomen including hypopygium are mounted on a similarly labeled microscope slide. The remaining five legs are still attached to the body.

Distribution. China (Sichuan, Jiangxi, Taiwan); Russia, Japan.

Remarks. For description and illustration of this species, also see Alexander (1930).

Figures

FIGURES 86 – 89. Rhipidia (Rhipidia) triarmata (Alexander, 1930) (holotype). 86: Habitus of male, lateral view; 87: Head of male, lateral view; 88: Antenna of male; 89: Wing; 90: Hypopygium, dorsal view. Scale bar: 86 = 2.0 mm; 87 = 0.5 mm; 88 = 0.5 mm; 89 = 1.0 mm.

FIGURE 90. Rhipidia (Rhipidia) triarmata (Alexander, 1930) (holotype). Hypopygium, dorsal view. Scale bar: 0.2 mm.