Vanhorniidae Crawford 1909

Family Vanhorniidae Crawford, 1909 Vanhorniidae Crawford, 1909: 63; Deyrup, 1985: 65; Timokhov & Belokobylskij, 2020: 60. Vanhorniinae: Hedqvist, 1976: 315 (synonymized with Proctotrupidae); Townes & Townes, 1981: 9. Diagnosis. Mandible exodont, malar sulcus absent; vertex roundly concave; occipital carina incomplete. Postspiracular sclerite (prepectus) present; postero-dorsal margin of mesoscutum present. Vein Rs connecting to R1. Trochantellus absent; hind basitarsus (first tarsomere) longer than second tarsomere. Petiole absent, metasoma connecting to nucha directly (shown by Mason (1983)); some tergites and sternites fused (syntergite and synsternite); first metasomal spiracle on synsternite; ovipositor sheath not developed; ovipositor directed anteriorly when not in use; ovipositor housed in groove on ventral part of metasoma. Host. Eucnemidae (Coleoptera). Distribution. Palaearctic, Oriental, and Nearctic regions. Remarks. This monotypic family is composed of the genus Vanhornia and only extant species are known. Their biology was discussed by Muona (2021).