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

distinct length; head without postgenal carina; hind orbits not carinate; head narrowing behind eyes; eyes large with their inner margins almost parallel. Prepectus present; fore tibial spur furcate at apex; tarsal claw with a subapical tooth shorter than apical one and a distinct basal lobe. Fore wing with 3rd cubital cell shorter than 2nd alone and only half of the 1st and 2nd combined; veins M and Rs+M meeting Sc+R at the same point, veins M and lm-cu parallel; vein 2A+3A atrophied, furcate and curved up at apex but not meeting 1 A. Hind wing with one closed middle cell. Distribution — India, Pakistan. Diagnostic combinations — This genus is very close to Pasteelsia Malaise, but some significant characters distinguish it from the latter: clypeus not truncate (truncate in Pasteelsia), claw with distinct basal lobe (without basal lobe in Pasteelsia), eyes parallel (converging in Pasteelsia), vein M and lm-cu parallel (subparallel in Pasteelsia), postgenal carina absent (present in Pasteelsia), antennái segments 4 and 5 equal (subequal in Pasteelsia) and veins M and Rs+M meeting Sc+R at the same point (vein M joins Sc+R slightly before the origin of Rs+M in Pasteelsia). Etymology — The genus is named after Dr. David R. Smith, USNM, Washington, a world authority on sawfly taxonomy. Gender: masculine. Davida tenuicornis (Rohwer) comb. n. (Figs 1-6) Tomostethus tenuicornis Rohwer, 1921: 107. Female — Colour: Body black, aureous are: pronotum; tegula; mesonotum; mesoscutellum; parapterum; upper 1/3 of mesopleuron. Legs piceous. Wings infumated; venation including costa, subcosta and stigma piceous. Structure: Average length 6 mm. Antenna (Fig. 6) long, filiform, 2.4 times head width; scape and pedicel each as long as its apical width; segment 3 longer than 4 as 6:5; clypeus slightly shallowly triangularly incised (Fig. 2); labrum with deflexed truncate anterior margin, broader than long as 3:1; supraclypeal area triangularly raised without carina; inner margins of eyes almost parallel with lower ends below level of antennái sockets; LID:IDMO:EL = 5:6:3; malar space 0.5 times diameter of median ocellus; supraantennal tubercles significantly raised, sloping backwards and confluent with low lying indistinct ridges; median fovea significant, ditch-like in its anterior half and posteriorly not reaching median ocellus; postocellar area subconvex, broader than long as 3:2; post-, inter- and circumocellar furrows distinct; lateral furrows quite deep, distinct and abruptly ending just before hypothetical margin of head; head slightly narrowing behind eyes; POL:OCL:UOL:UCL = 4:4:6:3; prepectus narrow but raised like a shoulder (Fig. 5), mesoscutellum subconvex, without carina, its appendage not carinate; ICD: ITD = 1:5; tarsal claw (Fig. 3) with a subapical tooth smaller than apical one and with a distinct basal lobe; metabasitarsus subequal to following 3 joints combined as 8:7; metatibial spurs equal in length; IATS:AWMT:OATS = 1:1:1. Lancet (Fig. 1) with 14 serrulae. Lateral view of ovipositor sheath as in Fig. 4. Sculpture and pubescence: Head and thorax impunctate, surface smooth and shining with general oily lustre; abdomen impunctate, subshining. Body covered with silvery pubescence except for the aureous parts where it appears to be golden. Male — Unknown. Material examined — Holotype: Tomostethus tenuicornis Rohwer (borrowed from USNM, Washington) labelled: Type, female, No. 225.12, 156, Tomostethus tenuicornis