Idiasta

Peris-Felipo, Francisco Javier & Belokobylskij, Sergey A., 2016, New South African species of the genus Idiasta Foerster, 1863 (Hymenoptera: Braconidae: Alysiinae), with a key to the Afrotropical and Malagasy taxa, Zootaxa 4150 (5), pp. 566-570 : 570

Key to the Afrotropical species of the genus Idiasta

The holotype of I. postscutellaris Szepligeti, 1908 ( Tanzania) is missing from the Swedish Museum of Natural History in Stockholm where it was housed (H. Vårdal, Curator, personal communication) and original description of this species ( Szepligeti, 1910) has not any characters allowing distinguish it from all other Idiasta species. As result, we have not included this species in our key.

1. Eye in lateral view 2.3–2.7 × as wide as temple medially. Vein SR1 5.0–5.7 × as long as vein 3-SR. Body length 2.5–2.8 mm. South Africa.................................................................... I. iaiaorum sp. nov. (♀ ♂)

- Eye in lateral view 0.8–1.5 × as wide as temple medially. Vein SR1 1.9–4.3 × as long as vein 3-SR.................... 2

2(1). Second flagellomere 1.1–1.3 × as long as first segment...................................................... 3

- Second flagellomere1.6–2.0 × as long as first segment....................................................... 4

3(2). Head in dorsal view 1.5 × as wide as median length. Vein SR 1 3.4 × as long as vein 3-SR. Second flagellomere 1.1 × as long as first segment. Notauli not reaching mesoscutal pit. Prescutellar depression with lateral carinae. Body length 4.0 mm. Madagascar....................................................................... I. madagascariensis Granger (♀)

- Head in dorsal view 2.0 × as wide as median length. Vein SR 1 2.5 × as long as vein 3-SR. Second flagellomere 1.3 × as long as first segment. Notauli reaching mesoscutal pit. Prescutellar depression without lateral carinae. Body length 4.0 mm. Zambia............................................................................... I. chingolaensis Fischer (♀)

4(2). First metasomal tergite 1.9 × as long as its apical width. Eye in lateral view 1.5 × as wide as temple medially. Vein SR 1 4.3 × as long as vein 3-SR. Body length 1.9 mm. Madagascar................................ I. curtimembrum Fischer (♂)

- First metasomal tergite 1.0–1.1 × as long as its apical width. Eye in lateral view 0.8–1.2 × as wide as temple medially. Vein SR1 1.9–3.3 × as long as vein 3-SR...................................................................... 5

5(4). Vein SR 1 3.0–3.3 × as long as vein 3-SR. Vein m-cu interstitial. Body length 6.5 mm. Uganda....... I. hiomae Fischer (♀)

- Vein SR1 1.9–2.2 × as long as vein 3-SR. Vein m-cu postfurcal................................................ 6

6(5). Eye in lateral view 0.8 × as wide as temple medially. Prescutellar depression subrectangular, with lateral carinae. Vein SR 1 1.9 × as long as vein 3-SR. Head, mesosoma and first metasomal tergite brown, rest part of body brownish black. Body length 5.5 mm. Ethiopia, India................................................................... I. magna (Papp) (♂)

- Eye in lateral view 1.0 × as wide as temple medially. Prescutellar depression subquadrate, without lateral carinae. Vein SR 1 2.2 × as long as vein 3-SR. Body, legs and tegula yellow to reddish yellow. Body length 6.25 mm. Kenya....................................................................................................... I. snizecki Fischer (♀)