Pagastia lanceolata (Tokunaga)

Pagastia lanceolata (Tokunaga) View in CoL

( Figs 3–4 View FIGURES 1–4 , 9–12 View FIGURES 5–12 )

Syndiamesa ( Syndiamesa) lanceolata Tokunaga, 1936: 530 View in CoL .

Pagastia lanceolata (Tokunaga) View in CoL ; Hashimoto 1985: 347; Endo 2004: 284; Ashe & O’Connor 2009: 294.

Syndiamesa ( Lasiodiamesa) crassipilosa Tokunaga 1937: 57 View in CoL .

Pseudodiamesa crassipilosa (Tokunaga) ; Sasa 1989: 64.

Material examined. Japan: 1 adult male, Honshu, Niigata Prefecture, Kanose-machi, Sanegawa River basin, 18. V.2004, leg. K. Endo ; 3 adult male, Honshu, Gunma Prefecture, Kasukawa-mura, Akagi Mount , Fudo-otaki , 8.IV.2001, leg. K. Endo ; 2 adult females, Honshu, Yamagata Prefecture, Asahi-machi, Asahi River basin, 19. V.2004, leg. K. Endo ; 7 adult males, 3 females, Honshu, Ikawa, Shizuoka City , 15. IX.1996 – 5. I.1997, leg. H. Niitsuma. All adults were raised from larvae and pupae by H. Niitsuma.

Adult male (n = 2).

Total length 4.0– 4.4 mm. Total length/wing legs 1.12–1.13.

Coloration. Head, thorax, legs, and abdomen brown to dark brown; antennae light brown; wings greyish.

Head. Eyes bare and strongly extended dorsomedially. Temporal setae including 4 coronals, 8 preoculars, 10 verticals. Clypeus with 20–24 setae. Antenna with 13 flagellomeres and developed plume, these setae ca 900 μm long; pedicel with 3 setae 52–60 μm long; terminal flagellomere with 1 subapical seta 48–52 μm long. AR 1.79.–1.93. Palpomeres lengths (in μm): 44–48; 96–104; 204–216; 260; 268–280. Palpomere 3 in distal part with sensilla capitata (diameter 12 μm). Palpomeres 1–5 length/head width 0.81.

Thorax. Antepronotum with 8–10 median antepronotals, 40–44 μm long, and 7–8 lateral antepronotals, 50–60 μm long. Acrostichals 25–29 (68–80 μm long), dorsocentrals 19–28 (in 1 row in anterior 2/3 and in 2 rows in posterior 1/3), prealars 14–17, scutellars 56–60 in 3–4 rows.

Wing. Length 3.56–3.88 mm; width 0.96–1.04 mm. Membrane without macrotrichiae, only with microtrichiae. R and R 1 with 56–77 setae; R 4+5 with 25–26 setae. Costa extension ca 60 μm long. RM length/MCu length 2.5. Anal lobe developed, outline rounded. Squama with 50–51 setae, 104–144 μm long.

Legs. Spur of fore tibia 96 μm long; spurs of mid tibia 64–68 μm and 64–68 μm; of hind tibia 88–100 μm and 64–80 μm long. Hind tibial comb with 10 setae. Lengths and proportions of leg segments as in Table 2.

Hypopygium ( Figs 3–4 View FIGURES 1–4 , 9–12 View FIGURES 5–12 ). Tergite IX with 10–17 setae on each side 115–156 μm long and with triangular anal point 72–80 μm long, which sometimes with apical peg. Laterosternite IX with 9–12 setae, 90–108 μm long. Transverse sternapodeme narrow, anterior margin nearly straight, 216 μm long μm long. Phallapodeme, 136–148 μm long, with lateral aedeagal lobe only, which 100–120 μm long, lanceolate. Gonocoxite 288–308 μm long, with basal plate and lobelike median field. Gonostylus 196–212 μm long, approximately the same thickness along its entire length, not expanded basally, and without a protrusion ( Figs 3–4 View FIGURES 1–4 , 9–12 View FIGURES 5–12 ); megaseta 8–12 μm long. HR 1.45–1.47.

Distribution. Japan (Honshu, Hokkaido and Shikoku) ( Endo 2004), Russian Far East (Kunashir Island of Kurile Archipelago).