Aconias tarsatus ( Bridgman, 1881 )

Aconias tarsatus ( Bridgman, 1881) View in CoL

[SJN: Ashimon-kuro-togari-himebachi]

( Figs. 5A–F, 6A–D, 78D)

Phygadeuon tarsatus Bridgman, 1881: 150 .

Plectocryptus pectoralis Thomson, 1896: 2383 . Chaeretymma lateannulata Strobl, 1901: 192 . Plectocryptus digitatus var. nigrofemorata Strobl, 1901: 206 . Plectocryptus albitarsis Uchida, 1936a: 45 . Syn. nov.

Materials examined. JAPAN: [Kunashiri Is.] SEHU, F (holotype of Plectocryptus albitarsis ), Furukamapu , 29. VII. 1935, T. Uchida leg. [Hokkaido] KPM-NK 102933 , 102934 , 102940 , 3 F, Tokachi, Shikaribetsuko , 25–26. VI. 1957 , R. Ishikawa leg.; KPM-NK 102928 , 102929 , 2 F, Horokanai Town, Uryu , 11. VII. 2012, M. Ito leg. ; KPM-NK 102930 , F, ditto, 17. VII. 2012, K. Watanabe leg. [ Honshu ] KPM-NK 102927 & OMNH, F ( OMNH) & M ( KPM-NK), Nagano Pref., Outaki Vil., Mt. Ontake-san, Hakkaisan , 16. IX. 2011, S. Fujie leg. ; KPM-NK 81194 , F, ditto, 22. IX. 2011, K. Watanabe leg. ; KPM-NK 102926 , F, Toyama Pref., Mt. Jodosan , 4. VII. 1972, M. Watanabe leg. ; KPM-NK 102932 , M, Toyama Pref., Toyama City, Arimine, Jyurodani , 15–22. IX. 2009 , M.

Watanabe leg. (MsT); KPM-NK 102931 , M, Fukui Pref., Katsuyama City, Oochozan , 5. IX. 1982 , H. Kurokawa leg. GERMANY: SEHU, 1M (det. Heinrich; as Ac. tarsatus ), Berchtesgaden, Jennermassiv, 13. VII. 1947 . AUSTRIA: LI, 1F (det. Schwarz; as Ac. tarsatus ), Hochasalm, 1935 , M. Priosnor leg.; LI, 1M (det. Schwarz; as Ac. tarsatus ), Oberösterreich, Maierleiten E Rottenegg, 11. VI. 2000 , J. Gusenleitner leg.

Description. Female (n = 9). Body polished; covered with setae; body length 7.4–10.3 mm.

Head 0.6 × as long as wide in dorsal view. Clypeus 2.45–2.75 × as wide as long; slightly convex in lateral view; sparsely punctate dorsally; transversely rugulose ventrally; punctures partly united into groove-like foveola; lower margin weakly rounded in frontal view, sharp and narrowly reflected in lateral view. Face 0.45–0.48 × as long as minimum width; slightly convex medially; matt; densely punctate medially; punctures partly united into groove-like foveola medially. Frons weakly concave above antennal sockets; punctate except for concavity above antennal sockets. POL 1.4–1.6 × as OD. OOL 1.4–1.9 × as OD. Gena and occiput densely punctate. Dorsal profile of gena rounded in dorsal view; width gradually narrowing posteriorly ( Fig. 5C). Occipital carina complete. Malar space 1.05–1.2 × as long as basal width of mandible. Mandible flat at base; lower tooth longer than upper tooth. Antenna with 24–26 flagellomeres; not flattened and tapped. FL I 2.5–2.6 × as long as maximum depth in lateral view, 1.2–1.3 × as long as FL II.

Mesosoma. Pronotum rugulose ventrally, densely punctate dorsally. Epomia absent. Mesoscutum densely punctate; with short and indistinct notaulus ( Fig. 5C). Scutellum sparsely punctate; weakly convex in lateral view. Mesopleuron longitudinally rugulose and punctate; punctures largely partly united into groove-like foveola; without conspicuous smooth area around speculum ( Fig. 5D). Epicnemial carina present laterally and ventrally. Sternaulus deep in anterior 0.5 of mesopleuron. Metapleuron obliquely rugulose; without juxtacoxal carina. Propodeum rugose or rugulose except for area externa finely and sparsely punctate with smooth ISP; anterior transverse carina absent; posterior transverse carina complete, inverted V-shaped ( Fig. 5F); lateromedian longitudinal carina weak and usually partly indistinct in front of posterior transverse carina; lateral longitudinal carina complete; pleural carina complete; area superomedia indistinct; apophysis small but pointed; spiracle elliptic. Fore wing length 7.5–9.8 mm. Areolet slightly wider than long; width slightly narrowing anteriorly; received vein 2m-cu at near or slightly beyond middle ( Fig. 5E). Fore wing vein 1cu-a interstitial to vein M&RS ( Fig. 5E). Nervellus subvertical; intercepted near posterior end of vein ( Fig. 5E). Hind femur reticulate coriaceous; with short setae; 4.2–4.65 × as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma. T I 1.85–2.25 × as long as maximum width; smooth and partly weakly coriaceous; latero-median carina absent; dorso-lateral carina complete and weak. T II 1.25– 1.4 × as long as maximum width; smooth; finely punctate laterally. Thyridium present; close to anterior margin of T II; slightly depressed; ca. 2.0 × as wide as length. T III to T V finely punctate except for largely smooth area of middle part of T III. Ovipositor sheath 1.1–1.25 × as long as hind tibia, 1.85–2.2 × as long as T I. Ovipositor straight; apex sharp; apex of lower valve with teeth ( Fig. 78D).

Colouration ( Figs. 5A–F). Body (excluding wings) black to blackish-brown. Setae silver; weakly tinged with brown in head and mesoscutum. Subapical part of mandible tinged with yellowish-brown. Pair of small spots between antennal socket and eye yellowish-brown to yellow. FL VII (or VIII) to FL X (or XI) with white to ivory markings. Hind TS III to TS IV ivory. Posterior margins of T I to T III narrowly tinged with reddish-brown. Thyridium and ovipositor reddish-brown. Wings hyaline. Veins and pterostigma blackish-brown to brown except for yellowish-brown wing base.

Male (n =7). Similar to female ( Figs. 6A–D). Body length 7.8–11.0 mm. Clypeus 2.4–2.5 × as wide as long. Face 0.5–0.6 × as long as minimum width. POL 0.8–0.9 × as OD. OOL 0.8–0.95 × as OD. Malar space 0.45–0.55 × as long as basal width of mandible. Antenna with 27–34 flagellomeres; with tyloids on FL XII (or XIII) to FL XVIII (or XIX, XX) ( Fig. 6D). FL I 2.75–3.4 × as long as maximum depth in lateral view, 1.1–1.3 × as long as FL II. Fore wing length 7.8–9.9 mm. Lateral section of anterior transverse carina absent or incomplete. Hind femur 7.2–8.0 × as long as maximum depth in lateral view. T I 4.45–5.2 × as long as maximum width. T II 2.4–2.5 × as long as maximum width. Face, ventro-lateral sides of face, clypeus, mandible except for teeth, palpi, postero-dorsal corner of pronotum yellow. Fore and mid legs paler than female; fore femur, fore and mid tibiae, and tarsi except for each TS V ivory to reddish-yellow. Basal part of hind tibia tinged with yellowish-brown. Hind tarsus ivory except for TS I.

Distribution. Japan (Kunashiri Is., Hokkaido, Honshu, and Shikoku); widely distributed in Palearctic region.

Bionomics. Unknown.