Eriborus cadjee Rousse et Villemant

Rousse, Pascal & Villemant, Claire, 2012, Ichneumons in Reunion Island: a catalogue of the local Ichneumonidae (Hymenoptera) species, including 15 new taxa and a key to species, Zootaxa 3278, pp. 1-57 : 17-18

Eriborus cadjee Rousse et Villemant , sp. nov.

( Figs 9 g–i)

Diagnosis. Black or black and brown species with yellow-orange legs and scape and pedicel ventrally orange; it is characterized by the strong carina-like row of hairs on ventral face of hind tarsomeres I-IV.

Description. FEMALE. Fore wing length 2.3–2.7 mm (2 specimens).

Head. Temples moderately long, almost straight, head weakly constricted behind eyes; occipital carina complete; ocellar triangle obtuse anteriorly, OOi = 1.2, IOi = 1.5; vertex and frons granulate; inner margins of eyes parallel, without indentation in front of toruli; face coriaceous, clypeus finely granulate, transverse, its apical margin truncate, labrum visible below, Ci = 4; MLMi = 1.2; mandible moderately short with upper tooth slightly longer than lower and with a short basal ventral flange; antenna with 20–22 flagellomeres, densely pubescent, flagellomeres 1–10 with a secondary median sub-division, FLi1= 5, first flagellomere 1.2 x as long as the second, 19th segment as wide as first segment and with FLi19 = 1.

Mesosoma. Mesoscutum coriaceous, with sparse punctures and moderately dense, fine golden erected hairs; mesoscutum subcircular in dorsal view and almost flat in profile, without notaulus; scutellum weakly convex, coriaceous, without lateral carina; pronotum and pleurae shining, alutaceous to ventrally coriaceous, speculum smooth; postpectal carina complete in front of mid coxa; propodeum coriaceous, strongly carinated, propodeal spiracle circular, area basalis bottle-shaped, larger at base and 0.8x as long as area superomedia, area superomedia 1.7x longer than wide, open posteriorly and with parallel lateral sides, forming with area petiolaris a weakly concave surface; area petiolaris transversally striated. Hind leg with hind tibia wider subapically than apically, tarsomeres 1–4 bearing a mid-ventral row of closely spaced hairs inserted on a high longitudinal flange; hind and middle tibiae with inner spur about twice longer than outer; tarsal claws basally pectinate. Fore wing with areolet absent, cu-a sligntly distad to Rs&M, abscissa of M between 2r-m and 2m-Cu less than 0.5x; hindwing with M&Cu distinctly elbowed apically, 1/Cu&cu-a straight and vertical, last abscissa of Cu1 absent.

Metasoma. Tergite I short, greatly widened apically, postpetiole 0.3x wider apically than petiole and regularly enlarging from petiolar spiracle to apex; basal part of sternite I distinctly cambered so that tergo-sternal suture at basal third of petiole is at its mid-height; glymma moderately deep; tergite II 1.7x wider than long; thyridium transverse, elliptic, distant from basal and lateral margins of tergite II by about its smallest diameter; postpetiole granulate, the following tergites alutaceous; ovipositor slightly upcurved with a distinct nodus and a deep subapical notch, ventral teeth and a subapical ventral thickening; OTi = 0.9.

Color. Black with clypeus lighter, mandible yellow and palps ivory white; antenna with scape and pedicel yellow ventrally, flagellum brownish; metasoma sometimes brownish; ovipositor sheath fuscous; legs orange-yellow, with fore and middle tarsi lighter, except the last segment darker; hind legs somewhat darker; hind tarsus brown; wings hyaline, pterostigma brown.

MALE. Unknown.

Comments. This species clearly belongs to the group of Campopleginae genera with specialized hind tarsus and vertical 1/Cu&cu-a on hind wing ( Eriborus , Xanthocampoplex , Melalophacharops ), although it shows significant differences from each of them. The affiliation to Eriborus implies an expansion of the genus diagnosis due to the long malar space and the strongly developed flange bearing a row of hairs on hind tarsus ( Gauld 1984). To date only four Eriborus species are known from the Afro-tropical region.

Distribution records. Reunion.

Type material. HOLOTYPE Ƥ ( MNHN EY 3898) Verbatim label data: La Réunion, St Philippe / Le Baril, alt. 170m, 04/2008, leg. Rousse, complete. PARATYPE ( MNHN EY 6428): 1Ƥ St Pierre / Bassin Plat, alt. 150m, IV.2007, leg. Cirad.

Figures

FIGURE 9. Campopleginae (females), habitus and faces. a-b: Campoplex techer sp. nov. c-d: Dusona douraguia sp. nov. e-f: Enytus huet sp. nov. g-h: Eriborus cadjee sp. nov. i: E. cadjee, left hind tarsus, profile.