Orestes draegeri

Appearance

''Orestes draegeri'' is a very slender and elongated species with relatively short legs. It is very similar to ''Orestes mouhotii'', from which it differs in its relatively shorter legs.

Males are approximately 40.0 to 41.2 millimetres long. In front of and behind the eyes there are mostly pairs of more or less distinct structures that are species-specific . The three pairs of occipital spines are designed as follows: The anterior supra-antennals are recognizable spinose and slightly pointed outwards. The pairs of anterior and posterior supra-occipitals behind it are smaller. The vertex is significantly enlarged, blunt and laterally compressed with the anterior coronals, which creates conspicuous, ear-like horns . The paired supra-orbitals behind the eyes are recognizable bluntly spinous. Posterior and lateral coronals are recognizable as small pointed tubercles that form a crown with the tip of the postocular carina located behind the eye, a distinct edge. The eyes are relatively small, circular and protruding strongly hemispherical. The antennae are shorter than the legs and consist of 23 segments. While the structures on the head resemble those of ''Orestes mouhotii'', these are missing in the males of ''Orestes draegeri'' distinct conical hump at posterior margin of the mesonotum which is slightly sulcate medially.

The females are approximately 45.7 to 47.1 millimetres long. Their head is flat and shows only indistinct structures in the form of tubercles. The tibae of middle legs are compressed laterally at the top and have an indistinct tooth at the end and a clear tooth in the middle. The fourth tergite of the abdomen is indistinctly widened and almost parallel to the rear. On the back of the ninth tergite there is a clearly elongated, strongly roof-like ridge in the center. In the females of ''Orestes mouhotii'' this crest is not roof-like and elongated and not notched at the back.