Male. Head and thorax shiny black wiith slight brown shading on the pleural sutures. Abdomen dorsally deep black-brown with the anterior portion of segments 4-7 faintly pale, hyaline, and with traces of a broken dark supraspiracular band; ventrally scarcely paler with similar hyaline areas and traces of small black spots in the postero-lateral corners of the middle segments. Legs deep brown Setae dirty white ringed with dark brown. Wings hyaline with pale brown longitudinal veins; the crossveins pale, except in the costo-apical region. Length of body 7 mm.; of wings 7 mm.