Cornugon petiolatum sp. nov.

(Figs 38–41, 88)

Diagnosis. Vertex with two humps, one behind each posterior ocellus, with a complete median groove and with a groove delimiting posterior part of ocellar triangle (Fig. 41); scutellum with a deep and distinct median groove extending from anterior margin along ¾ of length (Fig. 39); hind coxa conspicuously hairy on posterior surface; propodeum with a complete and strong median carina (Fig. 40); petiole about 3.5X as long as wide and reticulate with small meshes (Fig. 40); first gastral tergite shiny and large, covering 2/3 length of gaster.

Similar to C. leios and C. unicornis, but differing from both in having a very long petiole, and from the latter also in not having a horn on the upper-median frons.

Description. FEMALE. Length 1.4 mm. Antenna dark brown except scape white. Frons metallic dark purple, golden-green along eyes. Vertex metallic greenish-blue. Mesoscutum golden-green anteriorly, metallic greenishblue posteriorly. Scutellum metallic greenish-blue with metallic purple tinges posteriorly. Propodeum goldengreen. Coxae dark and metallic; femora, tibiae and tarsi white. Wings hyaline. Petiole metallic purple. Gaster weak metallic greenish-blue.

Antenna as in Fig. 88. Frons and vertex smooth and shiny (Figs 38, 41), frons concave; frontal suture reaching eyes at level of anterior ocellus; tentorial pits missing; vertex with two humps, one behind each ocellus.

Mesonotum with a more or less round fovea medially between mesoscutum and scutellum (Fig. 39). Midlobe of mesoscutum with weak reticulation, the meshes transverse, and sidelobes with engraved transverse reticulation (Fig. 39). Scutellum with anterior 1/2 smooth and shiny and posterior 1/2 with raised, strong reticulation (Fig. 39), but with a deep, distinct median groove extending from anterior margin along 3/4 length. Dorsellum short, with posterior parts visible in dorsal view (Fig. 39). Propodeum with a complete and strong median carina (Fig. 40), smooth and shiny between plicae.

Petiole about 3.5X as long as wide and reticulate with small meshes, hence dull (Fig. 40). Gaster ovate with first tergite shiny and large, covering 2/3 length.

MALE. Unknown.

Type material. Holotype female (LUZM) labelled " Honduras, Cortez, Parque Nacional San Cusuco, 5 km north of Buenos Aires, 15˚29'N 88˚13'W, 15.ix.1995, R. Cave, malaise trap in oak/pine cloud forest".

Etymology. Name referring to elongate petiole.

Distribution. Honduras.