Key to the species of the C. eldae species-group

1. Females............................................................................................. 2

-. Males (Males of C. marcapatensis and C. polita are unknown)................................................. 5

2(1). Tergite I strongly rugulose laterally, tergite II coarsely and closely punctate centrally (Fig. 2A). Hind wing with distal abscissa of Cu 1 absent, cu-a +first abscissa of Cu 1 not angled, straight, slightly reclivous (Fig. 3A)............... C. eldae Gauld

- Tergite I and II smooth and shiny, with fine setiferous punctures (Figs 2 B–D). Hind wing with distal abscissa of Cu 1 present and pigmented, joining cu -a +first abscissa of Cu 1 (Figs 3 B–D)................................................ 3

3(2). Distal abscissa of Cu 1 joining cu -a + Cu 1 at centre (Fig. 3B). Ovipositor bent up at distal 0.5, 1.25–1.28× as long as hind tibia (Fig. 5E). Ovipositor sheath 1.0–1.11× as long as hind tibia.................... C. catarina Bordera & Palacio sp. nov.

-. Distal abscissa of Cu 1 joining cu -a + Cu 1 clearly below centre (Figs 3C, D). Ovipositor weakly up-curved at apical 0.3–0.4, about same length as hind tibia (Figs 7F, 8E). Ovipositor sheath about 0.78–0.8× as long as hind tibia................. 4

4(3). Submetapleural carina strong and complete (Fig. 4C). Face with fine and moderately dense setiferous punctures (Fig. 7C). Occipital carina only weakly insinuated dorsally (Figs 7A, B, D) or absent. Tergite I 1.86–1.95× as long as posteriorly broad. Ventral two thirds of gena white (Figs 7A, E)............................ C. marcapatensis Bordera & Palacio sp. nov.

-. Submetapleural carina strong but only present at anterior third of metapleuron (Fig. 4D, arrow). Face smooth with very inconspicuous fine and scattered punctures (Fig 8B). Occipital carina weak but complete (Fig. 8A, C). Tergite I 2.22× as long as posteriorly broad. Gena almost entirely dark brown to black, except small yellow-orange mark just behind base of mandible (Fig. 8A)................................................................... C. polita Bordera & Palacio sp. nov.

5(1). Lower part of gena deeply concave, hypostomal carina conspicuously developed as a translucent sheet (Fig. 10A, arrow). Hind wing with distal abscissa of Cu 1 present and pigmented, intercepting cu -a + Cu 1 about centre, cu -a + Cu 1 reclivous (Fig. 10C). Tergite I smooth and shiny (Fig. 10E), with fine and relatively dense setiferous punctures laterally........................................................................................... C. catarina Bordera & Palacio sp. nov.

-. Lower part of gena not deeply concave, hypostomal carina not specially developed (Fig. 10B, arrow). Hind wing with distal abscissa of Cu 1 absent, cu-a + first abscissa of Cu 1 not angled, straight and weakly reclivous (Fig. 10D). Tergite I strongly rugulose punctate laterally (Fig. 10F)............................................................. C. eldae Gauld