STENOGASTRINAE, Bequaert, 1918

CARPENTER, JAMES M. & STARR, CHRISTOPHER K., 2000, A New Genus of Hover Wasps from Southeast Asia (Hymenoptera: Vespidae; Stenogastrinae), American Museum Novitates 3291 (1), pp. 1-12 : 2-3

KEY TO GENERA OF THE SUBFAMILY STENOGASTRINAE

1. Occipital carina evanescing before reaching the hypostomal carina............................. Liostenogaster van der Vecht Occipital carina reaching and fused with the hypostomal carina.................. 2 2. Metasomal segment II not petiolate basally .................................. 3 Metasomal segment II petiolate basally: extending approximately parallel­sided for at least 1.5 times its basal width........ 5

3. Scutum with notauli strongly impressed, outstanding on smooth integument; male antennae spatulate apically; maxillary palpi with the length of segment 2 approximately equal to that of segment 3............................. Chalogaster new genus Scutum with notauli present at most as traces, obscured by punctation; male antennae not spatulate apically; maxillary palpi with the length of segment 2 greater than the combined length of segments 3–6........ 4

4. Propodeum with raised lamella above propodeal orifice; scutellum without longitudinal median carina; male antennae with apical flagellomere truncate and flattened, often dilated; male hindwings without pigmented area............................ Stenogaster Guérin Propodeum without raised lamella above propodeal orifice; scutellum strongly carinate; male antennae with apical flagellomere conical; male hindwings with pigmented area posterobasally................................... Eustenogaster van der Vecht

5. Propodeal valvulae large, rounded; male mandibles with proximal teeth quite blunt............... Anischnogaster van der Vecht Propodeal valvulae reduced, completely attenuate at least posteriorly; male mandibles with proximal teeth sharp............ 6

6. Hindwings with posterior fringe of hairs greatly elongated, more so in males; vertex with median longitudinal groove; scutum with notauli strongly impressed, outstanding on smooth integument; males with bidentate mandibles, antennae with flagellomeres flattened, pleural area sunken and densely pubescent, and foretibiae with spatulate setae......... Metischnogaster van der Vecht Hindwings with posterior fringe of hairs very short; vertex without median longitudinal groove; scutum with notauli if strongly impressed then partly obscured by punctation; males with tridentate mandibles, without flattened flagellomeres, sunken pleural area, and spatulate setae on foretibiae................. Parischnogaster von Schulthess