Perilissini, Thomson, 1883

Reshchikov, Alexey & Achterberg, Cornelis Van, 2018, The Unicorn exists! A remarkable new genus and species of Perilissini (Hymenoptera: Ichneumonidae) from South East Asia, Acta Entomologica Musei Nationalis Pragae 58 (2), pp. 523-529 : 524

Partial key to the genera of the tribe Perilissini

This key enables identification of genera with hypostomal carina separated from occipital carina ventrally or joining occipital carina at base of mandible

1 Produced mid-longitudinal facial projection present ( Figs 1A, 1B , 2A ). T1‒3 with slight transverse impression. ....................................... Gilen gen. nov.

– Face without mid-longitudinal projection. T1‒3 without slight transverse impression........................ 2

2 Vein M+Cu of fore wing with tubercle or spur. Male parameres usually very long and narrow. ................... .......................................... Neurogenia Roman, 1910

– Vein M+Cu of fore wing without tubercle or spur. Male parameres usually not narrow. ....................... 3

3 T 1 in female approximately twice as long as broad. Apical margin of last visible sternite in male with one or several notches. Male parameres broadly triangular. Aedeagus reflexed and pointed apically, with adzelike blade. ....................... Priopoda Holmgren, 1856

– T 1 in female less than twice as long as broad. Apical margin of last visible sternite in male without notches. Male parameres mostly broadly rounded or rectangular in dorsal view. Aedeagus rounded and clubbed distally, without adze-like blade. .................. ......................................... Lathrolestes Förster, 1869

Figures

Fig. 1. Gilen orientalis sp. nov., holotype ♀. A – lateral habitus; B – face; C – propodeum; D – tarsal claw; E – metasomal tergites dorsally.

Fig. 2. Gilen orientalis sp. nov., holotype ♀ (except E – paratype ♁). A – head laterally; B – head and mesosoma dorsally; C – mesopleuron; D – head ventrally with occipital carina joined hypostomal carina at base of mandible; E – distal sternites of male.