444 PODICIPEDIDA. 
_ Mr. Chapman gives a series of measurements to prove his points of distinction for 
the three geographical forms into which he divides P. dominicus, but our series does 
not bear out his conclusions. Thus, a specimen from Duefias has a stouter and quite 
as long a bill as that of a typical San Domingo bird, while another example from the 
first-mentioned locality has it of the same size as that of a Texan bird. We have 
likewise a specimen from Corpus Christi which has a bill a little stouter and fully as 
long as the San Domingo example. 
LP. dominicus, considered in its wider sense, is a South-American species, which 
extends its range throughout our region into the Gulf States of North America. That 
it breeds in Central America cannot be doubted, as Grayson states that he found it 
abundant in all the freshwater ponds near Mazatlan and in Tepic throughout the 
entire year 17, 
Sumichrast, too, records the species as common on both coasts of Southern Mexico 
and on the lakes of the interior. The series sent from Cozumel Island consisted almost 
entirely of young birds 14; possibly this Grebe occurs there only on migration. _ 
We found it quite common on the Lake of Duefias, Guatemala, where we ultimately 
shot some adult birds in November 2°, At Coban its native name is “ Tzunun-ok-ok.” 
P. dominicus is the smallest of the American Grebes usually found on still water. 
Like other species of the family it is an expert diver. ‘The nest is a floating mass of 
wet reeds, lightly attached to the stalks of water-plants, and is similar to that of the 
European Little Grebe. 
PODILYMBUS. 
Podilymbus, Lesson, Traité d’Orn. p. 595 (1831); Grant, Cat. Birds Brit. Mus. xxvi. p. 553 
(1898). 
This genus agrees with Podicipes in the proportions of the secondary-quills and the 
tarsus, but has the culmen strongly curved downward towards the tip, with some 
bristly feathers on the forehead. 
One species only is known, breeding from ‘Temperate North America southward, 
and migrating to South America in winter. 
1. Podilymbus podicipes. 
The Pied-bill Dopchick, Catesby, Nat. Hist. Carol. i. p. 91, t. 91°. 
Colymbus podiceps, Linn. Syst. Nat. i. p. 223 (1766) *; Wagler, Isis, 1831, p. 580°. 
Podilymbus podiceps, Scl. & Salv. Ibis, 1859, p. 234*; Dresser, Ibis, 1866, p. 46°; Lawr. Ann. 
Lyc. N. Y. ix. p. 144°; Dugés, La Nat. i. p. 1427; Salv. P. Z.S. 1870, p. 219°; Cat. 
Strickl. Coll. p. 635°; Lawr. Mem. Bost. Soc. N. H. ii. p. 819?°; Sumichr. La Nat. v. 
p. 234; Baird, Brewer, & Ridgway, Water-Birds N. Amer. ii. p. 440; Ferrari-Perez, 
Pr. U. S. Nat. Mus. ix. p. 180"; Herrera, La Nat. (2) i. pp. 188", 330%; Stone, Proc. 
Acad. Philad. 1890, p. 202°; A. O. U. Check-l. N. Amer. Birds, 2nd ed. p. 3". 
