Microchelonus ibericus Tobias sp. n. (Fig. 1, 9-14)

Material. Holotype: ♀, "Hispania, Segovia, Pradena," "1987.VI.18, leg. Podlussany." Paratype: ♂, "Hispania, Burgos, Borbadillo de Herreros, 1987.VI.9," "leg. J. & A. Podlussany."

Description. Female. Head behind eyes weakly widened, oval in front view; its width 1.9 times its length and 1.2 times height. Temples 1.25 times as long as transverse eye diameter. Base of ocellar triangle longer than distance from posterior ocellus to eye by 1 diameter of ocellus. Distance between posterior ocelli 4 times diameter of ocellus. Longitudinal eye diameter 1.7 times transverse one, 1.7 times malar space. Width of face 2.3 times its height, 1.4 times transverse eye diameter. Height of face 1.2 times that of clypeus. Length of maxillary palpus 1.5 times malar space. Antennae as long as head and mesosoma combined; 1st flagellar segment 2.5 times, 2nd, 3 times, 4th, twice, and 5th, 1.5 times as long as wide; 5 apical segments beaded, as long as wide. Length of meso-soma 1.4 times its height. Propodeum steeply sloping, with transverse carina and rather large, rounded lateral teeth. Radial cell 3 times as large as 2nd radiomedial one, with anterior margin as long as pterostigma. Third radial abscissa weakly S-curved, 4 times as long as 1st one, 2.5 times as long as 1st radiomedial vein; 1st abscissa about as long as 2nd. Hind femur 3.3 times as long as wide. Hind tibia 4.5 times as long as wide; its inner spur 0.4 times as long as lst segment of hind tarsus. Hind tarsus as long as hind tibia, with 5th seg-ment as long as 3rd and shorter than 2nd.

metasoma oblong-oviform, narrowed to base, reflexed apically by 0.1 of its length; its length 1.85 times its width and 2.8 times height. Vertex behind ocelli finely striate; face laterally with fine rugae fan-shapedly running downwards; clypeus punctate, its lower half with strigae. Mesonotum densely rugulose-punctate; in posterior half, before scutellum, alveolate-rugulose, with predominance of striae. metasoma with rather coarse, undulate striae reaching its apex. Body black; fore tibia and tarsus brown; middle tibia, and middle and hind tarsi dark brown. Wings hyaline in basal half, weakly infuscate in apical one; pterostigma and most part of veins brown; mediocubital, anal, and basal veins pale yellow.

Body length 4.3 mm.

Male. Head narrowed behind eyes more strongly than that in female. Antennae 18-segmented; 1st flagellar segment 3 times its width. Apical abdominal opening slit-shaped, occupying entire width of posterior surface and third of lateral surface of carapace. Anterior part of mesonotum punctate, with smoothed microsculpture, shining. Striae of metasoma less coarse than those in female, reaching only its apical third. Legs darker than those in female, almost entirely black; wings more uniformly infuscate; veins in basal half of wing darker.

Body length 4.2 mm.

Differential diagnosis. M. ibericus is closely related to M. rimulosus (Thomson, 1874); differing from its variation with swollen temples in the distinctly weaker striae of the metasoma and the wider apical abdominal opening in male (occupying no more than 0.2 of lateral surface of the carapace in M. rimulosus). Among the eastern-Palaearctic species, M. ibericus is closely related to M. nigrimembris Tobias (Tobias, 1992, 2000); differing from it, in addition to the head widened behind the ocelli, in the distinctly paler wings. Its distinctions from M. laplandicus sp. n., described below, are listed in the key.