Here's a view of the stout proboscis (with two diminutive palps arching forward about mid-way?); the graceful long hairs on face, abdomen, & thorax; and the "fountain-pen-tip" or "dagger" shaped terminal antennal segments, rising out of the hairy mass of the segments below.

Note that the color of fine pile can often be hard to accurately discern, depending on angle of view, the lighting, background, etc. But here it can be seen that there is significant white pile throughout the abdomen, together with long black hairs concentrated mainly along the posterior margins of the tergites...just as described for C. melanoceratus (as opposed to entirely black pile for C. sackenii).