S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

DESCRIPTION OF THE NEW SPECIES Nematus flavominutissimus sp. n. Head mainly black. Whitish yellow: narrow inner and upper orbits, labrum, genae, lower half of clypeus, a spot above the clypeus, mandibles. Antennae black. Thorax mainly black. Pronotum, tegulae, metasternum whitish yellow. Metapleuron whitish yellow with black suffusion on the metepimeron. Legs entirely whitish yellow. Abdomen whitish yellow but abdominal tergites medially with brownish black suffusion. Wings hyaline. Venation brown, stigma and costa yellow. Head subparallel behind the eyes, shining, with undefined, slightly coarse surface sculpture. Median fovea deep and well outlined. Ratios of the antennái segments 1 to 9:4:2:19:19:19:15:15:14:13. Length of the 3rd antennái segment/longest diameter of the eye = 1/1. Longest/shortest diameter of the eye = 19/12. Clypeus broadly and roundly emarginated. Clypeal emargination 0.4 times as deep as its median length. OOL:POL:OCL = 8:8:5. Pronotum and propleuron shining and finely granulated. Mesonotum shining with shallow, slight and undefined surface sculpture. Mesoscutellum moderately shining with moderately deep and sporadic punctures. Mesoscutellar appendage moderately shining with moderately deep and moderately dense sculpture. Metascutellum shining, deeply and sporadically densely punctured. Mesopleuron smooth and shining. Length of a cenchrus/distance between the 2 cenchri = 7/8. Ratios of the hind tarsal segments, 1 to 5 without claws : (basitarsus) 18:8:5:3:8. Length of the hind basitarsus/length of the inner hind tibial spur = 9:5. Claws bifid. Pubescence on head and thorax whitish, about half as long as the diameter of the front ocellus. Sawsheath acute in lateral view, lower side clearly concave (Fig. 4). Length: 4.5 mm. Holotype — Female: Mecsek-hgs, Sikonda, 1958. VIII. 01, leg.: Mihályi. The holotype is deposited in the collection of the Hungarian Natural History Museum, Budapest. The new species is closely related to Nematus fuscomaculatus Förster, 1858 (Zhelochovtsev 1988). The new species has sawsheath acute apically in lateral view, serrulae with sharp teeth, abdominal tergites laterally whitish and smaller, 4.5 mm. In opposite, Nematus fuscomaculatus Förster, 1858 has sawsheath apically rounded in lateral view, serrulae with blunt teeth as figured in Zhelochovtsev 1988, abdominal tergites brownish black. Larger, 5.0-6.0 mm. The new species belongs to the subgenus Pteronidea Rohwer. Pachynematus hungaricus sp. n. Head black, including antennae. Yellow: whole orbits, labrum, palpi, mandibles, clypeus and a small spot above the clypeus. Thorax black. Yellow: pronotum, tegulae, a large spot on the mesopleuron covering nearly all the upper half, metapleurpon. Legs entirely yellow. Wings hyaline. Costa and stigma yellow, venation brown. Abdomen yellow. Tergites 1-5 black, 6-8 yellow with median black spots, the largest on the 6th and the smallest on the 8th. Ratios of the antennái segments: 4:2:22:29:25:23:22:20:20. OOL:POL:OCL - 8:9:7. Clypeus sligthly emarginated. Clypeal emargination 0.25 times as deep as its median length. Head shining, densely and moderately deeply punctured. Head contracted behind the eyes. Frontal basin shallow and pentagonal. Mesonotum