Genus Xanthotryxus Aldrich, 1930

Xanthotryxus Aldrich, 1930: 3. Type species: Xanthotryxus mongol Aldrich, 1930 (original designation).

Diagnosis.

Adults of this genus can be recognized by the combination of the following characters: bulk size, body length 9–13 mm, body totally black; eyes bare; parafacial bare or with hairs, facial carina broadly flat or slightly round, not angular; antennae black, arista plumose, vibrissa far from epistoma; scutum, scutellum and tergite with crinkly golden hairs; propleura and basisternum bare, suprasquamal ridge bare, postalar declivity with tomentum; basal tubercle of R 4 + 5 with small black setae, subcostal sclerite with a tuft of setae and yellow villi; legs black; abdomen with golden tomentum, cerci slender, acrophallus well developed and hypophallus not well developed (Fan 1997).

Distribution.

Palaearctic, Oriental.