Key to the species of the C. chaconi species group

1. Females (Figs 1A–C, 3A–D, 7A–E). Female of C. orellanae sp. nov. is unknown …………………2

– Males (Fig. 10 A–D). Males of C. caramba, C. melanoptera sp. nov., C. cinnamoptera sp. nov., C. porteri sp. nov., C. misionensis sp. nov., C. rondoniae sp. nov., C. hayesiana sp. nov., C. cuscoensis sp. nov. and C. amazonica sp. nov. are unknown …………………………………………………13

2. Metasoma highly specialised, with segments V–VII strongly modified (Fig. 1A) ………………… ……………………………………………………………… C. caramba Castillo & Sääksjärvi, 2015

– Metasoma non-specialised …………………………………………………………………………3

3. Wings strongly or moderately infuscate except in a broad hyaline band bordering veins Rs +2 r, 2 rs-m and 2 m-cu of fore wing (Fig. 1B–C) ………………………………………………………4

– Wings from hyaline to infuscate, but always without a hyaline band bordering veins Rs +2 r, 2 rs-m and 2 m-cu of fore wing (Figs 3 A–D, 7A–E) ……………………………………………………………5

3 4. Ovipositor slender, strongly upcurved at distal 0.45, about 1.4 times as long as hind tibia (Figs 1C, 2E). First flagellomere about 6.0 times as long as wide. Setae of ovipositor sheath, on average, about 1.35 times the sheath basal width (Fig. 2 E). Tergite I twice as long as broad (Fig. 2 C). Occipital carina strongly raised, forming a dorsomedial flange, conspicuously upcurved posteriorly (Fig. 2 A). Malar space 0.8 times as long as basal mandibular width .................................................................. …………………………………………… C. melanoptera Castillo, Sääksjärvi & Bordera sp. nov.

– Ovipositor stout, weakly upcurved in apical 0.5, about 1.25 times as long as hind tibia (Figs 1B, 2F). First flagellomere about 4.8 times as long as wide. Setae of ovipositor sheath, on average, about 1.8 times the sheath basal width (Fig. 2 F). Tergite I 2.3 times as long as broad (Fig. 2 D). Occipital carina weakly raised, forming a flat flange dorsomedially (Fig. 2 B). Malar space 1.0 times as long as basal mandibular width ………………… C. cinnamoptera Bordera & Sääksjärvi sp. nov.

5. Propodeum and metapleuron black and white/yellow (Fig. 3 A–D) ………………………………6

– Propodeum and metapleuron entirely orange (Fig. 7 A–E) ………………………………………9

6. Clypeal suture slightly curved (Fig. 4 C–D). Tergite II 1.0–1.2 times as long as broad (Fig. 5 A–B). Metapleuron 1.5–1.7times as long as deep.Antenna with31–33flagellomeres ………………………7

– Clypeal suture strongly curved (Fig. 6 A–B). Tergite II 1.3–1.4 times as long as broad. Metapleuron 1.8–2.0 times as long as deep. Antenna with 35–36 flagellomeres …………………………………8

7. Occipital carina weakly raised, forming a flat flange dorsomedially (Fig. 4 A). Tergite II about 1.2 times as long as broad (Fig. 5 A). Malar space 0.9–1.0 times basal width of mandible.………… ……………………………………………………………………………… C. chaconi Gauld, 1991

– Occipital carina strongly raised, forming a dorsomedial flange, conspicuously upcurved posteriorly (Fig. 4 B). Tergite II as long as broad (Fig. 5 B). Malar space about 0.65 times basal width of mandible …………………………………………………………… C. mocaguae Palacio & Bordera sp. nov.

8. Mesopleuron ventrally and mesosternum yellow (Fig 3 C). Hind wing with vein cu-a + abscissa of Cu 1 between M and cu-a vertical (Fig. 6 C). Epicnemial carina strong, reaching level of centre of pronotum. Gena, in frontal view, slightly rounded and strongly constricted below eyes (Fig. 6 A). Ovipositor sinuous and slightly upcurved on apical 0.4 (Fig. 6 E) ………… …………………………………… C. yabuquensis González-Moreno, Bordera & Sääksjärvi sp. nov.

– Mesopleuron and mesosternum orange (Fig. 3 D). Hind wing with vein cu-a + abscissa of Cu 1 between M and cu-a strongly reclivous (Fig. 6 D). Epicnemial carina ending considerably below level of centre of pronotum. Gena, in frontal view, straight and moderately constricted below eyes (Fig. 6 B). Ovipositor weakly and evenly upcurved on apical 0.5 (Fig. 6 F) ………… ………………………………………………………… C. porteri Bordera & Sääksjärvi sp. nov.

9. Hind coxa dorsally white, ventrally dark brown to black (Fig. 7 A–B). Ovipositor stout, strongly upcurved over apical 0.3–0.4 (Fig. 8 E–F) ………………………………………………………10

– Hind coxa mostly tinged with orange (Fig. 7 C–E). Ovipositor slender, weakly and evenly upcurved over apical 0.3–0.4 (Fig. 9 B, D, F) ……………………………………………………11

10 Clypeal suture slightly curved (Fig. 8 C). Occipital carina moderately raised, forming a flat dorsomedial flange, slightly upcurved posteriorly (Fig. 8 A). Tergites IV–VI with the dark brown area extending laterally backward on the white posterior band (Fig. 7 A). Epicnemial carina weak, its dorsal end considerably below level of centre of pronotum. Wings hyaline, with a slightly yellow tint (Fig 7 A) ………………………………… C. misionensis Bordera & Sääksjärvi sp. nov.

– Clypeal suture strongly curved (Fig. 8 D). Occipital carina strongly raised, forming a dorsomedial flange, conspicuously upcurved posteriorly (Fig. 8 B). Tergites IV–VI with the dark brown area not

extending laterally backward on the posterior white band (Fig. 7 B). Epicnemial carina absent. Wings moderately infuscate (Fig 7 B)………………………… C. rondoniae Bordera & Sääksjärvi sp. nov.

11. Antenna with 30 flagellomeres, first flagellomere about 4.9 times as long as wide. Clypeus twice as wide as long (Fig. 9 A). Hind wing with vein cu-a about 0.9 times abscissa of Cu 1 between M and cu-a. Hind coxa dorsally white cream, ventrally orange (Fig. 7 C). Hind femur mostly yellow cream, with basal and subapical dark brown and orange marks, respectively (Fig. 7 C). Ovipositor about 1.5 times as long as hind tibia (Fig. 7 C) ……………… C. hayesiana Bordera & Sääksjärvi sp. nov.

– Antenna with 33–36 flagellomeres, first flagellomere 5.8–6.1 times as long as wide. Clypeus 1.52–1.75 times as wide as long (Fig. 9 C, E). Hind wing with vein cu-a 0.35–0.40 times abscissa of Cu 1 between M and cu-a. Hind coxa orange, dark brown in ventral distal part (Fig. 7 D–E). Hind femur dark brown, distally and centrally (non-defined band) white (Fig. 7 D–E). Ovipositor 1.3–1.4 times as long as hind tibia (Fig. 7 D–E) …………………………………………………12

12. Clypeal suture slightly curved, almost straight (Fig. 9 C). Setae of ovipositor sheath, on average, about 1.2 times the sheath basal width (Fig. 9 D). Antenna with 33–34 flagellomeres. Malar space 0.55–0.65 times basal width of mandible. Tergite I 2.13–2.22 times as long as posteriorly broad ……………………………………………… C. cuscoensis Bordera, Castillo & Sääksjärvi sp. nov.

– Clypeal suture strongly curved (Fig. 9 E). Setae of ovipositor sheath, on average, about 3.0 times the sheath basal width (Fig. 9 F). Antenna with 35–36 flagellomeres. Malar space 0.75–0.83 times basal width of mandible. Tergite I 1.7–1.8 times as long as posteriorly broad …………… ………………………………………………………… C. amazonica Bordera & Sääksjärvi sp. nov.

13. Propodeum and metapleuron entirely orange (Fig. 10 A). Tergite I orange and black (Fig. 10 A). Face with very fine and sparse setiferous punctures (Fig. 11 A). First flagellomere about 6.7 times as long as wide ……………………………………… C. orellanae Bordera & Sääksjärvi sp. nov.

– Propodeum, metapleuron and tergite I black and white/yellow (Fig. 10 B–D). Face strongly and densely punctate (Fig. 11 B–D). First flagellomere 4.8–5.6 times as long as wide …………………14

14. Clypeal suture strongly curved (Fig. 11 B). Hind femur about 4.2 times as long as deep …………… ………………………………… C. yabuquensis González-Moreno, Bordera & Sääksjärvi sp. nov.

– Clypeal suture weakly curved (Fig. 11 C–D). Hind femur about 3.7 times as long as deep …………15

15. Occipital carina weakly raised, forming a flat flange dorsomedially (Fig. 11 E). Malar space about 0.8–0.9 as long as basal mandibular width ………………………………… C. chaconi Gauld, 1991

– Occipital carina strongly raised, forming a dorsomedial flange, conspicuously upcurved posteriorly (Fig. 11 F). Malar space about 0.65 times long as basal mandibular width …………… …………………………………………………………… C. mocaguae Palacio & Bordera sp. nov.