Glottis Koch, Syst. Zool.. pp. xlii, 304 (1816).
Type, Scolopax nebularia Gunnerus.
It is with considerable doubt that I separate the two birds contained in Glottis from Tringa. Their very decidedly recurved bills seem, however, to form a character of sufficient importance to rank as generic. The difference in the webs between the outer and inner and middle toes in these two birds and the genus Tringa is so very minute that it is of no importance at all.
In Glottis the bill is upturned over the terminal half of its length; the grooves and nostrils are as in the genus Tringa, the web between the outer and middle toe is well developed, that between the inner and middle toe obsolete; the wing is long with the first primary longest; the other characters are as in Tringa.
The Summer plumage differs from the non-breeding plumage in being darker.
The genus is cosmopolitan.
Key to Species.
A. Larger; wing 179 to 200 mm.; tarsus much longer in comparison, measuring 59 to 65 mm..................G. nebularia, p. 225.
B. Smaller; wing 174 to 181 mm.; tarsus much shorter in comparison ; 50 to 57 mm..................G. guttifer, p. 226.