Clistopyga nigriventris Palacio sp. nov.

(Figs 5A–J, 9C)

Diagnosis. Clistopyga nigriventris sp. nov. can be distinguished from all other species of the C. isayae species group by the combination of the following characters: metasomal tergites entirely black (Figs 5E, J); scutellum completely orange red (Figs 5D, I); posterior ocellus separated from eye 1.13–1.20 × its maximum diameter; subalar prominence densely punctuate, with at least 23 setiferous punctures epicnemial carina relatively strong; propodeal spiracle situated immediately above groove separating propodeum and metapleuron, groove continuous (Fig. 5D); tergite I 1.3–1.4 × as long as posteriorly broad (Fig. 9C).

Description. Female: Body length 9.2–11.3 mm. Fore wing length 7.0– 8.3 mm.

Head (Figs 5A–C). In dorsal view, weakly narrowed behind eyes. Gena smooth and shiny with uniformly sparse setiferous punctures, in dorsal view 0.33–0.35 × as long as eye (Fig. 5C), in frontal view almost straight and moderately constricted below eyes. Frons smooth and shiny. Vertex smooth and shiny, with very isolated setiferous punctures. Posterior ocellus separated from eye 1.13–1.20 × its maximum diameter (Fig. 5C). Distance between hind ocelli 0.96–1.01 × maximum diameter of posterior ocellus. Occipital carina completely absent. Face with fine and dense setiferous punctures, distance between punctures more than twice the diameter of punctures. Clypeal suture slightly curved (Fig. 5B). Clypeus 1.76–1.78 × as broad as medially long, distinctly convex in dorsal half, flat in ventral half, with apical margin bilobate. Malar space 0.82–0.86 × as long as basal mandibular width, with a granulate stripe between eye and mandible (Figs 5A, 5B). Antenna with 25–26 flagellomeres, first flagellomere 6.0–6.7 × as long as wide.

Mesosoma (Figs 5D, 5I). Pronotum shiny, mostly smooth, with fine and scattered setiferous punctures in upper posterior part. Mesoscutum entirely smooth and shiny, with fine, short and very sparse setiferous punctures. Notauli weak, reaching about 0.38 of length of mesoscutum (Fig. 5I). Mesopleuron shiny, with moderately sparse setiferous punctures, except in posterior part under speculum. Subalar prominence densely punctate, with about 23–42 setiferous punctures. Epicnemial carina relatively strong, its dorsal end weakly curved backward, ending slightly above level of centre of pronotum. Metapleuron shiny, glabrous, except for some sparse setiferous punctures at posterior end, 2.6–2.9 × as long as deep. Propodeum smooth and shiny, with sparse and fine setiferous punctures laterally; in dorsal view 1.2–1.4 × as long as medially wide. Propodeal spiracle situated immediately above groove separating propodeum and metapleuron, groove continuous (Fig. 5D). Hind leg with femur 3.93– 4.15 × as long as deep, 0.93–0.99 × as long as tibia.

Wings (Figs 5G–H). Fore wing with vein cu-a opposite or slightly distal to Rs & M. Vein 2 rs-m about 0.24–0.28 × as long as abscissa of M between 2 rs-m and 2 m-cu. Abscissa of Cu 1 between 1 m-cu and Cu 1 a 1.39–1.41 × as long as Cu 1 b (Fig. 5G). Hind wing with vein cu-a about 0.24 × as long as abscissa of Cu 1 between M and cu-a (Fig. 5H). Vein cu-a reclivous, abscissa of Cu 1 vertical and slightly curved. Vein Cu 1 well pigmented.

Metasoma (Fig 5E–F, 5J, 9C). Tergite I 1.3–1.4 × as long as posteriorly broad (Fig. 9C), smooth and shiny, with fine and relatively dense setiferous punctures laterally; spiracle near its basal 0.4; lateromedian longitudinal carinae strong, reaching about 0.2 of length of tergite; lateral longitudinal carinae strong, reaching about 0.2 of length of tergite. Sternite I extending back about 0.4 of length of tergite. Tergite II 1.15–1.37 × as long as posteriorly broad (Fig. 5J), central region shiny, with very fine and moderately sparse setiferous punctures; rest of tergites shiny, progressively more densely and strongly punctate. Ovipositor slender, shiny, very weakly upcurved at distal 0.2, 2.6–2.9 × as long as hind tibia (Fig. 5F). Ovipositor sheath about 2.0 × as long as hind tibia, length of setae on average about 1.3 × the sheath basal width.

Colouration. Head black with clypeus, frontal orbits widely, base of antennal sockets, lower gena, and mouthparts, except apex of mandibles, white; antenna brownish, ventrally pallid towards base, pedicel and apex of scape ventrally white (Figs 5A–C). Mesosoma with mesoscutum, scutellum, and most of pronotum orange red; metanotum, anterior margin of pronotum and subalar prominence whitish yellow; propleuron, most of mesopleuron, metapleuron and most of propodeum black; lower half of mesopleuron anteriorly, mesepimeron, and sides of propodeum white (Figs 5D, I). Metasoma with tergites entirely black (Figs 5E, J); ovipositor sheath black. Fore end middle legs white with coxae proximally and posteriorly black and femora and tibiae black striped dorsally; hind leg white with coxa proximally and laterally, trochanter proximally, and femur and tibia laterally black; hind tarsal segments blackish. Wings hyaline, pterostigma blackish brown.

Male: unknown.

Etymology. The specific name refers to the entirely black tergites of metasoma that distinguish this species from all the other members of the isayae species-group.

Type material. Holotype 1 ♀: Colombia, Boyacá, Arcabuco, SFF Iguaque, El Níspero, 0 5o 38´N, 73o31´W, 2730m, Malaise trap, 10 Jan–3 Feb 2001, coll. P. Reina (IAVH).

Paratype: 1 ♀, same locality and trap type, 2˗18 Feb 2002, coll. P. Reina (IAVH).

Distribution: Colombia.