Atrophini, Seyrig, 1932

Watanabe, Kyohei, 2020, Notes on the genus Pellis Sheng & Sun, 2014 (Hymenoptera, Ichneumonidae Banchinae), with a new record from Japan, Zootaxa 4877 (2), pp. 386-390 : 387-388

Key to Asian genera of Atrophini

(including some non-Asian genera with similar character states of Pellis)

1. First metasomal tergite slender, without a glymma. Spiracle of first metasomal tergite situated at, near or behind of the middle. Dorsal part of occipital carina partly to entirely absent. Ovipositor sheath distinctly longer than hind tibia............................................................................................ Leptobatopsis Ashmead, 1900

-. First metasomal tergite relatively stout, with or without a glymma. Spiracle of first metasomal tergite situated in front of the middle. Dorsal part of occipital carina complete or partly absent. Ovipositor sheath various in length................... 2

2. Ventral ends of occipital carina joined with hypostomal carina at base of mandible. Propodeal spiracle elongate. Areolet (if present) with a long stalk anteriorly. Ovipositor sheath distinctly longer than hind tibia............ Syzeuctus Förster, 1869

-. Ventral ends of occipital carina joined with hypostomal carina above base of mandible. Other character states various...... 3

3. Dorsal part of occipital carina broadly absent medially and areolet absent. Body with red and/or yellow parts............................................................................................. Tossinola Viktorov, 1958

-. Dorsal part of occipital carina complete or very narrowly absent medially. Areolet present or absent. Body sometimes without red and/or yellow parts................................................................................. 4

4. Ovipositor sheath shorter than 1.4 × as long as hind tibia ( Fig. 1 ). First metasomal tergite evenly and rather gradually narrowed toward base ( Fig. 7 )................................................................................... 5

-. Ovipositor sheath longer than 1.4 × as long as hind tibia. First metasomal tergite less strongly narrowed toward base, usually with a rather abrupt constriction at base................................................................... 12

5. The following all character states present: metanotum with hind rim sublaterally not or slightly expanded into a minute denticle; submetapleural carina strongly and usually abruptly broadened anteriorly, generally forming a distinct lobe ( Fig. 3 ); first metasomal tergite more or less sculptured ( Fig. 7 ); second and third metasomal tergites without a median transverse impression ( Fig. 7 ); ovipositor with a distinct subapical dorsal notch ( Fig. 8 )............................................... 6

-. At least one of the above character states absent...................................... genera not recorded from Asia

6. Areolet (vein 3rs-m) absent ( Fig. 4 ). Vein 2m-cu with a single bulla ( Fig. 4 ). Nervellus intercepted near the middle ( Figs 1, 4 ). T I without latero-median longitudinal carinae.............................................................. 7

-. Areolet (vein 3rs-m) present. Nervellus intercepted anterior to, near, at or posterior to the middle. T I with or without lateromedian longitudinal carinae............................................................................. 8

7. Bulla of 2m-cu long, longer than half length of the section of 2m-cu behind the bulla ( Fig. 4 ). Posterior transverse carina of propodeum absent ( Fig. 6 ). Male unknown............................................. Pellis Sheng & Sun, 2014

-. Bulla of 2m-cu short, at most 0.3 times as long as the section of 2m-cu behind the bulla. Posterior transverse carina of propodeum sometimes present.......................................... Diradops Townes, 1946 (not recorded from Asia)

8. Tarsal claw simple, without distinct teeth (only with a few setae). Clypeus 0.4 times as long as maximum width. Body and coxae black, with long erect setae except for A. genangusta Sheng, Zhang & Yang, 1997 . Nervellus intercepted posterior to the middle.......................................................................... Arenetra Holmgren, 1859

-. Tarsal claw at least partly pectinate (with some distinct teeth). Other character states various.......................... 9

9. Nervellus intercepted at or anterior to the middle. Body usually covered with long erect setae. Metasomal tergites black or red, without white or yellow bands. Ovipositor sheath sometimes longer than 1.0 × as long as hind tibia.......................................................................................... Alloplasta Förster, 1869 (most species)

-. Nervellus intercepted at or anterior to the middle. Body without long erect setae. Metasomal tergites sometimes with white or yellow bands. Ovipositor sheath shorter than 0.9 × as long as hind tibia......................................... 10

10. Mesoscutum with a pair of slightly raised, white or yellow, subtriangular anterolateral areas. Anterior transverse carina and posterior transverse carina absent.Antenna usually with a white band. Posterior margin of some metasomal tergites usually with a yellow band..................................................... Stictolissonota Cameron, 1907 (most species)

-. Mesoscutum without a pair of raised, white or yellow, subtriangular anterolateral areas (but not raised yellow spots sometimes present). Anterior transverse carina and posterior transverse carina absent. Anterior transverse carina and/or posterior transverse carina present or absent. Coloration of antenna and metasomal tergites various.................................... 11

11. The following all character states present: antenna with a white band in both sexes and with a tyloid-like carina on ventral surface of basal flagellomeres in female; 2m-cu with a single short bulla, its length ca. 0.2 × as long as the section of 2m-cu behind the bulla; areolet large, receiving 2m-cu near or at its outer corner; posterior transverse carina largely absent, represented by a weak or faint vertical ridge at apex on each side, the median part of this carina absent or faint...................................................................................................... Amphirchachis Townes, 1970

-. At least one of the above character states absent........ Cryptopimpla Taschenberg, 1863 and Hadrostethus Townes, 1970 *

12. Areolet (vein 3rs-m) present............................................................................ 13

-. Areolet (vein 3rs-m) absent............................................................................ 17

13. Nervellus intercepted at or anterior to the middle. Head and mesosoma covered with long setae, which length longer than height of ocellus............................................................ Alloplasta Förster, 1869 (some species)

-. Nervellus intercepted at or posterior to the middle. Body without long erect setae................................. 14

14. Mesoscutum with a pair of slightly raised, white or yellow, subtriangular anterolateral areas. Anterior transverse carina and posterior transverse carina of propodeum absent. Ovipositor sheath 1.85 × as long as hind tibia.................................................................................................... Stictolissonota Cameron, 1907 ......................................................(a single species, S. longiterebra Chandra & Gupta, 1977 )

-. Mesoscutum without a pair of slightly raised, white or yellow, subtriangular anterolateral areas. Other character states various .................................................................................................. 15

15. Base of first metasomal tergite with a pair of lateral triangular teeth. Second and third metasomal tergites with rather strong sublateral swellings............................................................... Odinophora Förster, 1869

-. Base of first metasomal tergite without a pair of lateral triangular teeth. Second and third metasomal tergites with or without weak sublateral swellings.............................................................................. 16

16. Laterotergite of fifth metasomal tergite not separated by a crease. Posterior portion of mesosternum with large sublateral tubercle. Apical portion of ventral valve of ovipositor with distinct teeth....................................................................................... Ichnoverruca Sheng & Jennings, 2019 (= Verruca Sheng & Sun, 2018 )

-. Laterotergite of fifth metasomal tergite separated by a crease. Mesosternum without tubercle. Apical portion of ventral valve of ovipositor without teeth................................................... Lissonota Gravenhorst, 1829 (in part)

17. The crease separating laterotergite of the fifth metasomal tergite present. Latero-median longitudinal carina of first metasomal tergites usually absent or indistinct. First metasomal tergite usually without longitudinal striae............................................................................................... Lissonota Gravenhorst, 1829 (in part)

-. The crease separating laterotergite of the fifth metasomal tergite absent and first metasomal tergite always with longitudinal striae................................................................... Himertosoma Schmiedeknecht, 1900

Figures

FIGURES 1–8. Pellis acarinata Sheng & Sun, 2014, females from Japan. 1, dorsal habitus; 2, head, frontal view; 3, head and mesosoma, lateral view; 4, left fore wing; 5, right hind leg; 6, propodeum, lateral view; 7, first to third metasomal tergites, dorsal view; 8, ovipositor, lateral view.