Eusterinx (Ischyracis) solida Dasch, 1992

Humala, A. E., 2025, A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae), Zoosystematica Rossica (China) 34 (1), pp. 149-159 : 157

Eusterinx (Ischyracis) solida Dasch, 1992

( Fig. 17)

Material examined. Mexico: Tamaulipas: Gómez Farías, Alta Cima , 2 Nov. 1990, E. Ruíz C. leg., 1 male ( UAT) ; same locality, MT, 19–26 June 1999, S. Hernández A. leg., 1 female ( UAT) ; same locality, MT, 3–10 July 1999, S. Hernández A. leg., 2 females ( UAT, ZISP) ; Gómez Farías , 12 Oct. 1998, D. R. Kasparyan leg., 1 male ( UAT) ; Gómez Farías , La Perra, bosque de pino [pine forest], 24 Oct. 1998, D. R. Kasparyan leg., 2 males ( UAT), 1 male ( ZISP) ; 8 km N of Ciudad Mante, El Limón , 26 Dec. 1998, D. R. Kasparyan leg., 1 male ( ZISP) ; SW of San Carlos, Rincón Murillo , selva baja [lowland rainforest], 21 Oct. 1995, S. Hernández leg., 1 female, 1 male ( UAT), 1 female ( ZISP) ; Quintana Roo, Vallehermoso, rancho No. 3, 23 July 1993, H. Delfin T.M. leg., 1 male ( UAT) ; Hidalgo, Huasca de Ocampo , rancho Santa Elena, 2480 m a.s.l., MT, 2003, E. Ruíz C. leg., 1 female ( UAT) ; Jalisco, Tequila, 7 km to volcano, Bosque de Quercus [oak forest], 1970 m a.s.l., 23 Sept. 2011, E. Ruíz C. leg., 1 male ( UAT) ; Morelos: Cuernavaca , UAEM, 1900 m a.s.l., bosque Pinus -yerbas [herbaceous pine forest], 27 Oct. 2011, E. Ruíz C. leg., 1 male ( UAT) ; N of Cuernavaca , 19°01′09.24ʺN 99°15′53.28ʺW, 2420 m a.s.l., 20 Oct. 2011, A.I. Khalaim leg., 1 female ( UAT) ; Tlaxcala, 15 km SSE of Apizaco, N slope of La Malinche Volcano , 19°17′20.4ʺN 98°01′48ʺW, 3000–3040 m a.s.l., 2 Oct. 2016, A. Humala & A.I. Khalaim leg., 1 female, 2 males ( ZISP) ; Chiapas, 10 km ESE of San Cristóbal de las Casas , 16°40′04.81ʺN 92°33′01.82ʺW, 2400 m a.s.l., pine forest, 6–7 Aug. 2021, A.I. Khalaim leg., 4 males ( ZISP) .

Remarks. This species was originally described within E. solida species–group ( Dasch, 1992), without assignment to any subgenus, and subsequently, formally, the species was included in the catalogues of world Ichneumonidae ( Yu & Horstmann, 1997; Yu et al., 2016) in the nominative subgenus Eusterinx . Dasch (1992) noted that this species is related to E. bispinosa Strobl, 1900 belonging to the subgenus Ischyracis , though in E. solida the inner eye orbits are not convergent to the clypeus, the hind femora are inflated and the eyes are setose. Based on morphological studies, I consider this species as occupying an intermediate position between the subgenera Ischyracis and Trestis , because it shares the characters of both subgenera, and I tentatively place this species in the subgenus Ischyracis . However, further research of the Neotropical fauna and possibly the application of molecular techniques are required to clarify the position of E. solida within the genus Eusterinx .

Distribution. Nearctic and Neotropical species: USA (Arizona), Mexico (Tamaulipas, San Luis Potosí, * Jalisco, * Hidalgo, Estado de México, Guerrero, * Morelos, * Tlaxcala, Puebla, Veracruz, * Chiapas, Quintana Roo), Costa Rica, Argentina. Such a range, covering both North and South America, is possibly a unique case among orthocentrine species. However, the Neotropical fauna is still poorly studied.

Eusterinx (Ischyracis) tenuiventris Humala et Ruíz-Cancino, 2017

( Fig. 18)

Type material examined. Holotype. Male, Mexico, Tamaulipas, Gómez Farías, Alta Cima , MT, 3–10 July 1999, S. Hernández leg. ( UAT) . Paratype. Mexico, Tamaulipas, Gómez Farías , 12 Oct. 1998, D. R. Kasparyan leg., 1 male ( UAT) .

Distribution. Mexico (Tamaulipas) ( Humala

& Ruíz-Cancino, 2017).