Nephrotoma is a genus of crane flies. For terms see Morphology of Diptera. Nephrotoma species have a lustrous body, which is yellow with black or brown stripes and spots.If the body is black there are coloured bands on the abdomen. The prescutum has three stripes. The proboscis (rostrum) is short and the antennae are verticillate. Sc2 fuses with radial vein R slightly distal to the base of the radial sector vein Rs an this is not longer than mcu. m1 is sessile, only rarely short and petiolate. mcu is located before the base of the discal cell (d). Tergite 9 of male has microscopic black streaks at the apex.