Exetastes Gravenhorst, 1829

Watanabe, Kyohei & Sheng, Mao-Ling, 2018, Taxonomic notes on Exetastes fukuchiyamanus Uchida, 1928 (Hymenoptera, Ichneumonidae, Banchinae), with description of a new species from Japan and China, Zootaxa 4399 (2), pp. 281-288 : 282

Genus Exetastes Gravenhorst, 1829

Exetastes Gravenhorst, 1829: 395 . Type species: Ichneumon fornicator Fabricius, 1781 . Designated by Westwood (1840).

Leptobatus Gravenhorst, 1829: 432 . Type species: Leptobatus ziegleri Gravenhorst, 1829 . Designated by Viereck (1914).

Semnophrys Förster, 1869: 158. Type species: Exetastes notatus Holmgren, 1860 . Designated by Perkins (1962).

Rhimphalea Förster, 1869: 202. Type species: Rhimphalea brevicorpa Davis, 1897 (= Exetastes bioculatus Cresson, 1872 ). Included by Davis (1897).

Icyona Cameron, 1903: 340. Type species: Icyona rufipes Cameron, 1903 (= Campoplex longipes Smith, 1878 ). Monobasic.

Allexetastes Kokujev, 1904: 106. Type species: Exetastes (Allexetastes) komarovi Kokujev, 1904 . Designated by Viereck (1914).

Rhynchexetastes Cameron, 1906: 102. Type species: Rhynchexetastes violaceipennis Cameron, 1906. Monobasic.

Tegona Morley, 1913: 251. Type species: Tegona rufipes Morley, 1913 (= Campoplex longipes Smith, 1878 ). Monobasic.

Pseudexetastes Meyer, 1927: 308. Type species: Pseudexetastes diakonovi Meyer, 1927. Original designation.

Diagnosis. This genus can be distinguished from other genera of Banchini by the following combination of character states: labrum less than 0.7 × as long as height of head, not developed into a long tongue; epicnemial carina present ( Fig. 6 ); upper tooth of mandible about same length as lower tooth; lower part of occipital carina joining hypostomal carina above base of mandible; flagellum usually long and slender; laterotergites of T2 and T3 less than 0.3 × as wide as long; anterior end of vein cu-a of fore wing opposite or distad from posterior end of vein Rs+M; ovipositor sheath 0.14 to 1.8 (usually ca. 0.3) × as long as hind tibia (after Townes, 1970).

Distribution. Worldwide excluding the Australasian and Antarctic regions.

Remarks. This genus is the largest genus of Banchini , containing about 168 species ( Riedel, 2015; Sheng et al., 2016; Yu et al., 2016).

Figures

FIGURES 1–7. Exetastes compressus sp. nov., female (holotype)—1, lateral habitus; 2, apical part of antenna; 3–5, head, frontal (3), lateral (4), and dorsal (5) view; 6, mesosoma, lateral view; 7, propodeum, dorsal view.