1. Liotryphon atriceps (Cresson, 1874) Ephialtes atriceps Cresson 1874: 394 [♀ (ANSP), Mexico, Veracruz, Orizaba]. References. Cameron 1886: 262 [Ephialtes; Mexico (Veracruz)]. Morley 1914: 16 [Ephialtes; remarks]. Cresson 1916: 18 [lectotype ♀ (ANSP) designated; Mexico, Veracruz, Orizaba]. Townes & Townes 1960: 97 [Apistephialtes]. Townes & Townes 1966: 12 [catalogue; Mexico]. Ruíz-Cancino et al. 2002: 645 [checklist; Mexico]. Remarks. We know this species only from its descriptions and remarks on the morphology from following publications: [Body] pale ferruginous. Head, antennae, most of prothorax, sutures on thorax above, and transverse spot on lateral apical margin of second and three following abdominal segments black. Scape beneath, tegulae, line before [on upper margin of pronotum] and most of legs white. Hind coxa and femur (except tips) pale honey-yellow. Line on fore and mid femora above and tarsi dusky. Wings hyaline, iridescent. [Body] elongate, narrow, smooth and shining. Head subglobose. Antennae short, slender. Metathorax smooth, rounded. Metasoma subsessile, very long, of uniform width, segments 2–5 above with a swelling on each side of middle. Fore wing with areolet subtriangular (Cresson 1874). “Abdomen red or ferrugineous, at least towards the anus... Mesothorax red, with scape and callosity at tegulae white” (Morley 1914: 15). Townes (Townes & Townes 1960: 87) also mentioned that mesoscutum of this species is almost bare, unlike Nearctic species having mesoscutum with moderately dense setae. Distribution. Mexico (Veracruz).

Published as part of Khalaim, Andrey I. & Ruíz-Cancino, Enrique, 2022, Darwin wasps of the subfamily Pimplinae (Hymenoptera: Ichneumonidae) of Mexico: Ephialtes genus-group, pp. 201-251 in Zootaxa 5169 (3) on page 224, DOI: 10.11646/zootaxa.5169.3.1, http://zenodo.org/record/6952172