Orgilinae, Ashmead, 1900

Ahmed, Ishtiaq, Kazmi, Sarfrazul Islam & Rameshkumar, Anandhan, 2022, New record of Orgalonia van Achterberg and description of a new species of Orgilus Haliday (Hymenoptera: Braconidae: Orgilinae) from India, Zootaxa 5195 (5), pp. 437-448 : 438

Key to the tribes, genera and species of subfamily Orgilinae known from India

1. Hind wing vein M+CU shorter than 1-M; fore wing first discal cell slender, if robust then posterior margin of hind wing distinctly concave sub-basally; basal cell of hind wing very small; vein cu-a of hind wing strongly reclivous (Tribe Mimagathidini ) ( Fig. 2G )................................................................................................ 2

- Hind wing vein M+CU as long as or longer than 1-M; first discal cell of fore wing comparatively robust; posterior margin of hind wing convex, straight or slightly concave subbasally; basal cell of hind wing medium-sized or large; vein cu-a of hind wing variable ( Fig. 4F ) (Tribe Orgilini ); clypeus without tubercles; tarsal claws less slender; hind tarsus usually shorter and often more robust........................................................... Orgilus Haliday ( Figs 4K, 4L )…3

2. Occipital carina absent or only up to mid level of eyes; third and fourth metasomal tergites with sharp lateral crease ( Figs 2C, 2E & 2I ); sclerotized part of vein 2-M of fore wing absent or nearly so ( Fig. 2G ); length of ovipositor sheath 0.7–0.8 × fore wing length; mesoscutum, third and fourth metasomal tergites, apex of hind femur and tibia dark brown; antenna yellowish ventrally..................................................................... Orgilonia ashmeadi (Viereck)

- Occipital carina lamelliform, reaching upper level of eyes; third and fourth tergites without sharp lateral crease; sclerotized part of vein 2-M of fore wing distinct ( Fig. 5 )................................................ Stantonia Ashmead …4

3. First metasomal tergite 1.5 × as long as its apical width; tergites 3–7 smooth...................................... 5

- First metasomal tergite 1.3 × as long as its apical width; tergites 1–4 strongly sculptured; ovipositor sheath 0.60–0.68 × fore wing length....................................................................... Orgilus indicus sp. nov.

4. Surface of propodeum smooth; sides of pronotum and hind coxae largely smooth or finely punctate; surface of first tergite shiny and smooth to faintly coriaceous; antenna with a yellowish ring medially................... Stantonia agroterae Nixon

- Surface of propodeum coarsely reticulate rugose, anteriorly; hind coxa punctate with few transverse carinae dorso-posteriorly; sides of pronotum crenulate medio-anteriorly and striate posteriorly, antennae brown............. Stantonia hayati Ahmad

5. Ovipositor sheath as long as abdomen+half thorax length; metasomal tergite II 1.3 × as long as broad basally............................................................................................. Orgilus jennieae Marsh

- Ovipositor sheath as long as combined length of head+ thorax + abdomen; metasomal tergite II 1.25 × as long as broad at base.......................................................................... Orgilus lepidus Muesebeck

Figures

FIGURE 2. Orgilonia ashmeadi; Head: A. dorsal, B. frontal, C. lateral; D. Antenna; Mesosoma: E. lateral, F. dorsal; G. wings; Metasoma: H. dorsal, I. lateral; J. ovipositor sheath; K. first metasomal tergite; L. terminal ovipositor; M. hind tarsus.

FIGURE 4.. Orgilus (I.) indicus sp. n.; A–C. Head dorsal, frontal and lateral; D. Mesosoma lateral; E. Mesosoma dorsal; F. Wings; G. Antenna; H. Metasoma dorsal; I. Metasoma lateral; J. Apical ovipositor; K. Hind tarsi; L. Hind tibial spur; M. Hind femur.

FIGURE 5. Stantonia fore wing (drawing after Ghramh et al. 2021)