Imasega Krombein, 1983

Li, Shuang-Shuang & Xu, Zai-Fu, 2017, First record of Imasega Krombein from China, with description of one new species (Hymenoptera, Chrysididae, Amiseginae), Journal of Hymenoptera Research 54, pp. 71-77 : 72

Genus Imasega Krombein, 1983 Figs 1 , 2 , 3-5 , 6-8

Imasega Krombein 1983: 41. Type species: Imasega rufithorax Krombein, 1983. Monotypic and original designation.

Imasega Krombein: Kimsey and Bohart 1991: 111.

Diagnosis.

Male. Antenna elongate; F4-F8 3.7-5.0 × as long as wide. Scapal basin slightly concave, with weak transverse rugulae. Malar space with vertical sulcus. Eyes bulging and with setulae. Occipital carina absent. Prothorax yellowish brown. Pronotum with longitudinal median groove posteriorly and pit before lateral lobe. Mesoscutum with notauli and faint parapsides. Notauli complete or incomplete. Mesopleuron without omaulus or scrobal sulcus. Metanotum 0.8-1.2 × as long as mesoscutellum medially, with large triangular median enclosure. Propodeum with short dorsal surface, and abrupt posterior and lateral surfaces; posterolateral tooth short and blunt. Forewing with R1 two-thirds as long as stigma or longer; Rs extended by curved dark streak. Hind coxa without dorsobasal carina. Tarsal claw with large median tooth. Metasomal tergites and sternites punctate. Female. Unknown.

Biology.

Unknown.

Distribution.

Oriental Region: China (new record), Sri Lanka ( Kimsey and Bohart 1991).

Key to the species of Imasega

1	Prothorax yellowish brown, mesothorax (excluding upper mesopleuron), metathorax and propodeum black (Figs 1 , 2 , 5 ); scapal basin with longitudinal median ridge; notauli incomplete, present on posterior half (Figs 2 , 5 ); head 1.4-1.7 × as wide as distance from clypeal apex to posterior ocelli; F4-F8 3.7-4.4 × as long as wide	Imasega bicolor Li & Xu, sp. n.
-	Mesosoma yellowish brown, with brown to blackish brown marks on pronotum, mesoscutum and metanotum (Figs 6 , 7 ); scapal basin without longitudinal median ridge; notauli complete (Fig. 7 ); head 1.2-1.4 × as wide as distance from clypeal apex to posterior ocelli; F4-F8 4.0-5.0 × as long as wide	Imasega rufithorax Krombein

Figures

Figure 1. Imasega bicolor sp. n., male, holotype, habitus, lateral view.

Figure 2. Imasega bicolor sp. n., male, holotype, habitus, dorsal view.

Figures 3 - 5. Imasega bicolor sp. n., male, holotype. 3 Antenna 4 Head, frontal view 5 Head and mesosoma, dorsal view.

Figures 6 - 8. Imasega rufithorax Krombein, male from Karunaratne, Sri Lanka. 6 Habitus, lateral view 7 Habitus, dorsal view 8 Labels.