Xenus Kaup., Skizz. Entwick. Gesch. Nat. Syst., p. 115 (1829).
Type by mon., Scolopax cinerea Guldenstadt.
Xenus differs from the preceding genus, Limnodromus, as also from the next following, Tringa, in having the bill nearly twice as long as the tarsus and strongly curved upwards. The Summer and Winter plumages are practically the same and the former is not rufous as in the Godwits.
Both upper and lower mandibles are grooved, the long oval nostril being placed in the upper groove close to the base of the bill; the tarsus is short but longer than the middle toe and claw and is scutellated in front and behind ; the hind toe and claw are well developed and the anterior toes webbed; the middle claw is dilated but not pectinated; the first primary is longest, the second nearly as long.
* Terekia Bonaparte, Comp. List B. of Europe and N. Am., p. 52 (1838) is antedated by Xenus and cannot therefore be employed for this genus.