256 
ON THE CLASSIFICATION OF BIRDS. 
rounded ; the first quill shorter than the fourth. 
Tail lengthened, rounded. 
P. Cuvieri. Zool. 111. i. 32. 
castaneus. I.O.pl.lO.f.l. 
megacephalus. Fart 5. 
No. 22. 
ruficeps. Ib. No. 24. 
Lateral toes equal. Brazil, 
pectoralis. Part 5. No. 25. 
leucogaster. Ib. No. 26. 
albifrons. Ib. No. 27. 
Spisii. Ib. No. 28. 
riiger. Ib. No. 29. 
SuBFAM. FLUVICOLIN.d5. fValer-Ckats. 
Legs formed for walking. Tarsi lengthened, strong. 
Inhabit the sides of marshes and rivers in Tropical 
America. Seisura, alone, is Australian. 
Gubebnetes, Vigors. Tail very long, excessively 
forked ; the first quiU nearly as long as the three 
next. Lateral toes equal. Claws long, acute, and 
slightly curved. 
G. forficatus. Zool. Journal, ii. pi. 4. 
Alectubus, Vieil. Tail compressed on the sides, erect, 
broad, with the shafts of some of the feathers naked 
and lengthened. Head very large. Bill short, strong, 
triangular, depressed, without a culmen. Feet large. 
Wings rounded. 
A. psalurus. PI. Col. 286 
Fluvicola, Sw. Bill somewhat lengthened, stnooth 
and convex above, generally without any culmen. 
Feet strong, large ; the transverse anterior scales en- 
veloping the tarsus. Wings long, pointed ; the 
second quiU longest. Tail even or rounded. Plu- 
mage varied with black and white. 
F. cursoria. Sw. Zool. 111. ii. pi. 47. 
Blechropus, Sw. Bill short, triangular, somewhat conic, 
but depressed. Culmen obsolete. Nostrils round, 
pierced in the substance of the bill. Wings mode- 
rate ; the third quill longest. Feet small, weak. — 
N. B. The bill much resembles that of Pachyce- 
phala. Plumage more or less black. Pepoaza Azara. 
No species figured. 
Seisuba, H. and V. Bill lengthened, much depressed. 
