Forrestopius Gauld & Sithole, 2002 (Hymenoptera: Ichneumonidae: Metopiinae) in South America Author Alvarado, Mabel Departamento de Entomología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos. Av. Arenales 1256 Jesús María, Lima 14, Perú & Bosque Llaqta, Av. Confraternidad Internacional Este N ° 364, Huaraz, Perú. Author Palacio, Edgard Instituto Colombiano Agropecuario, Calle 18 Nº 50 - 32 Soledad, Barranquilla, Colombia & Laboratorio de Entomología, Departamento de Biología, Pontificia Universidad Javeriana, Bogotá, Colombia. text Zootaxa 2021 2021-09-21 5040 2 265 282 journal article 10.11646/zootaxa.5040.2.6 1175-5326 5531247 B10750F1-0CD9-4A61-B071-29989FB307B3 Forrestopius petiolatus Palacio sp. nov. ( Figs 6 , 10B ) Holotype . ♀ , “ COLOMBIA : Boyacá , Arcabuco, finca El Edén, 5°25’N 73°27’W , 6.v.2001 , 2800m , Net trap , T . Angarita” ( MPUJ _ ENT ). Diagnosis. This species can be recognized by the following combination of characters: mandible with two teeth, clypeus+face forming a continuous surface, antenna with 22 flagellomeres, wrinkle arising from pronotal pit reaching about two thirds way to anterior margin ( Fig. 6D ), tergite I petiolate, 2.9× as long as posteriorly wide ( Fig. 6B ); tergite II 2.1× as long as posteriorly wide, hind wing with distal abscissae of M , Cu 1, and 1 A indistinguishable. The slender metasoma with tergite I petiolate distinguish this species from all others in the genus. Description. Female: Body length 6.8 mm . Fore wing length 4.6mm . Head . Face and clypeus forming a continuous surface 1.0× as long as wide, punctate, centrally rugo-reticulate, with upper quarter transversely striate ( Fig. 6C ); labrum not exposed when mandibles closed; mandibles with two teeth; malar space 0.6× as long as basal mandibular width; lateral ocellus separated from compound eye by about 1.4× maximum ocellar diameter; distance between ocelli 1.6× maximum ocellar diameter; vertex behind ocellar triangle more or less convex, occiput abruptly declivous; gena in lateral view about 1.2× as long as compound eye; antenna with 22 flagellomeres, ratio of length from second to fourth flagellomeres: 1.4:1.2:1.2, subapical flagellomere 1.0x as long as centrally broad. Mesosoma . Pronotum with a wrinkle arising frompronotal pit reaching about two thirds way to anterior margin ( Fig. 6D ); metapleuron smooth and polished with sparse setae on apical part, posteroventrally; submetapleural carina smooth, anteriorly expanded into a triangular lobe. Propodeum with lateromedian longitudinal carina strong, slightly closer to each other anteriorly; area basalis+superomedia 3.9× as long as wide; lateral longitudinal carina anteriorly absent; posterior transverse carina complete, enclosing area petiolaris and area coxalis. Fore wing with vein Cu 1 a between Cu 1 b and 2 m-cu 1.2× as long as Cu 1 between Rs & M and 1 m-cu ; 2 rs-m 0.8× as long as abscissa of M between 2 rs-m and 2 m-cu . Hind wing with distal abscissae of M , Cu 1 and 1 A indistinguishable. Outer metatibial spur 0.7× as long as inner spur. Metasoma . Tergite I 2.9× as long as posteriorly wide ( Fig. 6B ), lateromedian carina absent, smooth with isolated punctures laterally on the apical half; tergite II 2.1× as long as posteriorly wide; laterotergite II about 0.1× as wide as long; laterotergite III about 0.3× as wide as long, wedge-shaped, mesal edge straight. FIGURE 6. Details of Forrestopius petiolatus , sp. nov. A. Habitus of female, in lateral view (scale bar = 1 mm) B. First metasomal tergite, in dorsal view. C. Facial view D. Head and pronotum, in lateral view Colour . Body extensively black except palpi, apex of mandibles, inner surface of prothoracic and mesothoracic tibiae, tarsi, ovipositor, and valvae brownish yellow to brown. Male . Unknown Remarks. This species occurs in Cloud forest of Colombia at 2800m ( Fig. 10C ). Etymology . The specific epithet petiolatus refers to the elongate first metasomal segment that distinguishes this species from all other in the genus.