Male. Wings with two brown spots in apical portion of subcostal cell. A row of about six short stout bristles on the distal half of the posteroventral surface of mid femora. Prosternum with a few hairs anteriorly and posteriorly, and a few hairs also present on the middle of the propleura in front of the spiracle. Genitalia similar to D. pictipes Loew, except the anterior claspers (see figure), which are bent forward hookwise, narrowly laterally expanded at the apex, and with a thin transparent web in the sinus of the hook.