S. Mahunka szerk.: Folia Entomologica Hungarica 57. (Budapest, 1996)

Etymology — The genus name is adopted from a unique character of frontal area which is unlimited from sides and anteriorly there is a strong horizontal ridge stretching from one eye to the other. The neutral form is used. Remarks — In Malaise's (1963) key to the world genera, this new genus runs to couplet 89, where it happens to differ from a Mexican genus Rohwerina Malaise, 1963. It differs from Rohwerina on the basis of the following characters: antennái segments 3 and 4 equal (3rd antennái segment distinctly longer than 4th in Rohwerina); the crossvein of anal cell joins brachium at an angle of about 85° (cross-vein joins brachium at an angle of about 70° in Rohwerina); scape and pedicel almost equal (scape distinctly longer and broader than pedicel in Rohwerina); specimens of Ridgea gen. n. are about 5.5 mm (those of Rohwerina are 8-9 mm long). For the description of this new genus and species, the terminology of Malaise (1945) and Ross (1937, 1945) has been followed. Holotype will be deposited in the National Pusa collection, IARI, New Delhi (India) after this work is published. Abbreviations — AT = apical tooth of claw, CL = clypeus, EL = eye length, IARI = Indian Agriculture Research Institute, IATS = inner apical tibia spur, ICD = intercenchral distance, IDMO = interocular distance at level of median ocellus, ITD = intertegular distance, LB = labrum, LID = lower interocular distance, MB = metabasitarsus, OATS = outer apical tibial spur, OCL = ocello-occipital line, OOL = oculo-ocellar line, POL = postocellar line, SAT = subapical tooth of claw. Ridgea kalatopense sp. n. (Figs 1,2, 3) Female — colour: Body black, yellowish white are: scape, pedicel more or less, posterodorsal angle of pronotum, tegula, transverse stripe on posterior margin of propodeum. First two abdominal tergites and sternites reddish brown. Legs pale except extreme tips of metatibia and metatarsi which are fuscous. Wing hyaline; costa, stigma and venation dark brown. Structure: Average length 5.5 mm. Antenna filiform, 2.3 times head width, scape and pedicel almost equal, segments 3 and 4 equal. Clypeus subconvex with anterior margin shallowly roundly emarginate (Fig. 1). Labrum broader than long as 2:1 with rounded anterior margin. Malar space 0.2 times diameter of median ocellus. LID:IDMO:EL = 2.0:2.3:2.2; OOL:POL:OCL = 1.4:1.0:1.0. Frontal area raised to level of eyes, unlimited from sides, anteriorly having a strong horizontal ridge stretching from one eye to the other. Median fovea shallow with flat bottom, posteriorly extending to median ocellus. Supra-clypeal and supra-antennal pits distinct. Circum-, inter- and postocellar furrows indistinct. Lateral furrows shallow, diverging backwards and abruptly ending well before hypothetical posterior margin of head. Postocellar area subconvex, wider than long, as 2:1. Head narrowing behind eyes. Inner margins of eyes subparallel in middle. Mesoscutellum subconvex, its appendage not carinate. ITD:ICD = 4.1. Epicnemium subconvex, separated from mesopleuron by a distinct furrow. Mesepisternum obtusely raised without carina or acute apex. Subapical tooth at the middle of claw and shorter than apical one (Fig. 2). Metabasitarsus equal to following tarsal joints combined. IATS:MB: OATS = 2.0:6.5:1.9. Lancet with 4 serrulae (Fig 3). Sculpture and pubescence: Head and thorax smooth, shining and impunctate. Abdomen impunctate subshining. Pubescence negligible. Male — Not found.